Glossary
Online marketing, SEO and AI evolve quickly. In our glossary we explain the most important terms — clearly and practically, so you can make better decisions.
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A
- A/B Testing A/B testing compares digital variants to determine which performs best, driving data-backed decisions for higher conversions and better UX.
- Affiliate Marketing Affiliate marketing is a performance-based strategy where affiliates earn commissions by promoting products or services for merchants.
- AI Overviews Google AI Overviews are AI-generated answer summaries that are revolutionizing search results and require new SEO strategies.
- Alt Tag & Title Tag Optimize alt and title tags for better SEO and accessibility to enhance rankings and user experience.
- Anchor Text Anchor texts are clickable link texts that optimize SEO and user guidance—key for rankings and user experience.
- API (Application Programming Interface) An API is a programming interface for structured data exchange between programs - central to automation in online marketing.
B
- Backlinks Backlinks are hyperlinks from external websites that serve as trust signals for search engines like Google, enabling top SEO rankings.
- Baidu Baidu is the leading search engine in China and requires specific SEO strategies to access the Chinese market.
- Bing Bing is Microsoft's search engine and the second-largest in the West, with growing importance for AI search like Copilot.
- Black Hat SEO Black Hat SEO includes manipulative methods that violate search engine guidelines and can lead to penalties.
- BM25 BM25 is a probabilistic ranking algorithm that calculates document relevance to search queries more precisely than TF*IDF.
- Bounce Rate Bounce rate measures the percentage of visitors who leave a website after viewing only one page—a key indicator for UX and SEO.
- Branded Content Branded Content connects brands with target audiences through valuable, entertaining content and storytelling instead of traditional advertising—authentic and emotional.
- Breadcrumb Navigation Breadcrumb navigation helps users orient themselves and optimizes SEO through a clear site structure.
- Browser Cache The browser cache stores files locally, speeds up loading times, and improves SEO by optimizing Core Web Vitals.
C
- Canonical Tag The canonical tag tells search engines the preferred version of a URL and prevents duplicate content issues.
- Click-Through Rate (CTR) The Click-Through Rate (CTR) measures how many users click on a link or ad—critical for SEO and online marketing.
- Conversion Funnel The conversion funnel maps the journey from first contact to purchase and helps identify optimization opportunities in the customer journey.
- Conversion Rate The conversion rate measures how many visitors to a website complete a desired action—key to online marketing success.
- Core Web Vitals Core Web Vitals are three metrics defined by Google that influence user experience and ranking: loading time, responsiveness, and visual stability.
- Customer Journey The customer journey describes the path a customer takes from the first contact to the purchase decision and beyond – including all touchpoints.
- Customer Personas Customer personas are detailed profiles of typical ideal customers that align marketing and SEO strategies effectively.
D
- Disavow Disavow allows you to devalue harmful backlinks via Google Search Console but is only useful in exceptional cases like manual penalties.
- Domain A domain is the unique name of a website that translates the IP address into a human-readable address and shapes online identity.
- Domain Authority (DA) Domain Authority (DA) is a metric developed by Moz that evaluates the predicted ranking strength of a website on a scale from 1 to 100.
- Duplicate Content Duplicate Content refers to identical or very similar content under multiple URLs, usually unintentional and technically caused.
- Dwell Time Dwell time indicates how long visitors stay on a webpage - a key indicator of content quality and user satisfaction.
E
- EAA - BFSG (Accessibility Reinforcement Act) The Accessibility Reinforcement Act (EAA / BFSG) mandates accessibility for digital products and services from 2025 under the EU directive.
- Engagement Rate The engagement rate measures user interactions and indicates whether content resonates with the target audience—essential for social media, emails, and websites.
F
G
- GDPR The GDPR regulates the protection of personal data in the EU and affects every website - with obligations such as privacy policies and cookie consent.
- GEO (Generative Engine Optimization) GEO optimizes content for AI-powered response systems to position brands as trusted sources—the future of visibility.
- Google Algorithm The Google algorithm determines the order of search results—we explain how it works and what matters.
- Google Analytics Google Analytics 4 (GA4) is Google's free web analytics tool for evaluating user behavior, traffic sources, and key events for data-driven online marketing.
- Google My Business Google My Business (Google Business Profile) is the free tool for local businesses to gain visibility in Google Search and Maps.
- Google Search Console (GSC) Google Search Console (GSC) is the free SEO tool from Google for monitoring your website's organic visibility and indexing.
H
- Headings Headings structure web content for users and search engines - from H1 to H6. Optimize headings for SEO and accessibility.
- Heatmap Heatmaps visualize user interactions on websites—ideal for data-driven design optimizations and higher conversion rates.
- Hreflang The hreflang attribute helps search engines display the correct language and country version of a website to users.
- HTML Base Tag The HTML Base Tag defines a base URL for relative links and influences the default behavior of all references on a webpage.
- HTML Body The HTML body contains all visible content of a webpage and is central to SEO, user experience, and semantic structure.
- HTML Head The HTML head contains invisible metadata that controls search engines, browsers, and social media—essential for SEO and user experience.
I
- Infinite Scrolling Infinite Scrolling enables seamless browsing but poses SEO risks such as crawling issues and missing linkable URLs.
- Information Retrieval Information retrieval is the technical foundation of every search - from search engines to AI systems like ChatGPT.
- Internal Linking Internal linking connects content, strengthens SEO, and guides users effectively through your website—a key lever for better rankings.
J
K
- Keyword Density Keyword density refers to the percentage of a keyword in a text, but it is irrelevant for modern SEO—topical depth matters instead.
- Keywords Keywords connect user queries with relevant content - essential for successful search engine optimization (SEO).
- KPI (Key Performance Indicator) KPIs (Key Performance Indicators) are measurable metrics that objectively represent the success of goals in online marketing and enable data-driven decisions.
L
M
N
- Native Advertising Native advertising is online advertising that seamlessly integrates into editorial content and is less intrusive than traditional ads.
- Natural Language Processing (NLP) Natural Language Processing (NLP) enables computers to understand and generate human language - the foundation for AI like ChatGPT and modern SEO.
- Negative Keywords Negative keywords exclude irrelevant search queries in Google Ads, optimizing ad budgets through more targeted ad placement.
- Negative SEO Negative SEO involves malicious tactics to deliberately harm a website's search engine ranking - we outline protection strategies.
- Net Promoter Score (NPS) The Net Promoter Score (NPS) measures customer loyalty through a simple question about likelihood to recommend - a key success indicator.
- Newsletter Marketing Newsletter marketing enables direct customer contact without algorithms - legally compliant, measurable, and with a high ROI.
O
- Off-Page Optimization Off-page optimization includes all SEO measures outside your own website to boost authority and trust online.
- On-Page Optimization On-page optimization includes all SEO measures on your own website, from content and technology to structure, forming the foundation of every SEO strategy.
- Organic Search Results Organic search results are unpaid listings in search engines generated by relevance and quality - key to successful SEO.
- Owned Media Owned Media refers to self-controlled channels such as websites or blogs - the foundation for independent and sustainable online marketing.
P
- Page Speed Page Speed refers to the loading time of a website and is a key factor for user experience, SEO, and conversion rates.
- PageRank PageRank is a Google algorithm that measures the importance of web pages based on their links - still relevant for SEO today.
- Pay per Click (PPC) PPC (Pay per Click) is an online advertising model where advertisers pay only for actual clicks on their ads.
- Performance Marketing Performance marketing focuses on measurable results like purchases or leads - payment is only for actual performance, not visibility.
Q
- QR Code (Quick Response Code) QR codes bridge offline and online marketing: they store URLs, contact details, or Wi-Fi access and make traditional advertising digitally measurable.
- Quality Score The Quality Score evaluates the relevance of ads, keywords, and landing pages in Google Ads, impacting costs and ad position.
- Quota Quota refers to a usage limit for services, APIs, or tools in online marketing that protects servers and ensures fair resource distribution.
R
- Rebranding Rebranding is the fundamental realignment of a brand to modernize, reposition, or stand out from competitors.
- Redirect A redirect forwards visitors and search engines from one URL to another - essential for SEO during relaunches or domain changes.
- Referral Marketing Referral marketing leverages targeted customer recommendations to acquire high-quality new customers cost-effectively - through trust and incentives.
- Relaunch A relaunch fundamentally renews websites but carries SEO risks like ranking losses - proper planning ensures visibility.
- Remarketing / Retargeting Remarketing and retargeting specifically target users who have already shown interest in your offer—for higher conversion rates.
- Responsive Design Responsive design ensures optimal display on all devices and is essential for modern SEO and user-friendliness.
- Retention Rate The retention rate measures how many customers a company retains over a specific period - a key indicator of loyalty and success.
- Robots.txt The robots.txt file controls how search engines crawl websites - but not indexing. Learn how to use it correctly.
- ROI (Return on Investment) ROI measures the ratio of profit to investment costs and is a key metric for marketing success.
S
- SEA (Search Engine Advertising) SEA (Search Engine Advertising), or search engine advertising, enables immediate visibility through paid ads on search engines like Google - ideal for fast results.
- SEM (Search Engine Marketing) SEM (Search Engine Marketing) is the umbrella term for SEO and SEA to increase visibility in search engines and target customers effectively.
- SEO (Search Engine Optimization) SEO (Search Engine Optimization) boosts your website's organic visibility in search engines like Google - sustainably and cost-effectively.
- SERP SERP (Search Engine Results Page) is the results page displayed after a search query - key to visibility and SEO success.
- Social Media Marketing Social Media Marketing (SMM) leverages social networks to strengthen brands, reach target audiences, and boost conversions.
- Spam Spam refers to unsolicited mass communication or manipulative SEO techniques that harm brands and pose legal risks.
- Storytelling Storytelling in marketing conveys messages through stories - emotional, memorable, and tailored to the target audience.
T
- Target Audience The target audience is the foundation of every marketing strategy— the more precisely defined, the more effective content, advertising, and conversions become.
- TF-IDF TF-IDF is a statistical method for evaluating the relevance of terms in texts and forms the basis of many SEO analyses.
- Tokenizing (Tokenization) Tokenization is the process of breaking down text into tokens so that AI models like GPT can process it—essential for costs and SEO.
- Tracking-Pixel Tracking-Pixels are invisible tracking elements for user analysis but require GDPR-compliant consent and transparent use.
U
- URL A URL is the unique address of a webpage on the internet and a key factor for search engine optimization (SEO).
- Usability Usability describes how easily and efficiently users can navigate a website - critical for SEO, conversions, and a positive user experience.
- User Engagement User engagement reveals how actively users interact with websites - a key indicator of quality and relevance in online marketing.
- User Experience (UX) User Experience (UX) describes the user's interaction with websites or apps - critical for SEO, trust, and conversion.
- User Intent User Intent refers to the intention behind a search query and is crucial for targeted SEO content.
- User-Generated Content (UGC) User-Generated Content (UGC) refers to content such as reviews or social media posts created by users rather than the company.
- USP (Unique Selling Proposition) USP (Unique Selling Proposition) is the unique feature that sets your offering apart from the competition and convinces customers.
V
- Viral Marketing Viral marketing spreads content through users themselves - like a virus - and achieves enormous reach on a small budget.
- Voice Search Voice Search refers to internet searches conducted via spoken language - optimize your content for voice assistants like Siri, Alexa, and Google Assistant.
W
X
- X-Robots-Tag The X-Robots-Tag controls file indexing via HTTP headers - ideal for PDFs, images, and non-HTML content in technical SEO.
- XML (Extensible Markup Language) XML is an extensible markup language for structured data, essential for SEO (e.g., XML sitemaps) and platform-independent data exchange.
- XML Sitemap An XML sitemap is a machine-readable table of contents for a website that helps search engines find and index pages faster.
- XSS (Cross-Site Scripting) XSS (Cross-Site Scripting) is a security vulnerability where attackers inject malicious code into websites to steal user data or manipulate pages.
Y
- Yahoo! Yahoo! is a long-standing internet brand whose search results are powered by Bing - separate SEO optimization is therefore unnecessary.
- Yandex Yandex is the leading search engine in the Russian-speaking region with its own ecosystem and ranking algorithms - essential for local SEO.
- YMYL (Your Money or Your Life) YMYL (Your Money or Your Life) refers to Google topics with a high impact on health, finances, or safety - strict quality standards apply here.