Read the notes, then try the practice. It adapts as you go.When you're ready.
Session Length
~17 min
Adaptive Checks
15 questions
Transfer Probes
8
Search engine optimization (SEO) is the practice of improving the quantity and quality of traffic to a website through organic (non-paid) search engine results. It encompasses a broad set of technical, content, and strategic disciplines aimed at making web pages more discoverable, relevant, and authoritative in the eyes of search engines like Google, Bing, and others. At its core, SEO bridges the gap between what users are searching for and the content that best answers their queries, relying on an understanding of how search engine crawlers index pages and how ranking algorithms evaluate relevance and trustworthiness.
The field of SEO is typically divided into three pillars: on-page SEO, off-page SEO, and technical SEO. On-page SEO involves optimizing individual web pages through keyword research, content creation, meta tags, heading structures, and internal linking. Off-page SEO focuses on building a site's authority through backlinks, brand mentions, and social signals from external sources. Technical SEO addresses the underlying infrastructure of a website, including site speed, mobile-friendliness, crawlability, structured data markup, and secure connections (HTTPS). Together, these pillars form a comprehensive approach to improving a site's visibility in search engine results pages (SERPs).
SEO has evolved dramatically since the early days of keyword stuffing and link farms. Modern search engines use sophisticated algorithms incorporating machine learning, natural language processing, and user experience signals to deliver the most helpful results. Google's major algorithm updates, such as Panda, Penguin, Hummingbird, RankBrain, and the Helpful Content Update, have progressively rewarded high-quality, user-focused content while penalizing manipulative tactics. As a result, successful SEO today requires a holistic strategy that prioritizes genuine value for users, technical excellence, and ethical practices aligned with search engine guidelines.
One step at a time.
The process of discovering and analyzing the search terms that people enter into search engines, in order to use those insights for content strategy and page optimization. It involves evaluating search volume, keyword difficulty, and user intent.
Example: A bakery owner uses keyword research tools to discover that 'gluten-free birthday cake near me' has high search volume and low competition, then creates a dedicated landing page targeting that phrase.
The practice of optimizing elements within a web page to improve its search rankings. This includes title tags, meta descriptions, heading hierarchy, content quality, keyword placement, image alt text, and internal linking structure.
Example: A blog post about hiking boots includes the target keyword in the title tag, H1 heading, first paragraph, and image alt text, while also providing comprehensive and well-structured content.
Incoming hyperlinks from one website to another. Search engines treat backlinks as votes of confidence, where links from authoritative and relevant sites carry more weight in improving a page's ranking potential.
Example: A local restaurant receives a backlink from a respected food critic's blog, which signals to Google that the restaurant's website is trustworthy and relevant for food-related searches.
The optimization of a website's infrastructure and server-side elements to help search engine crawlers discover, render, and index content efficiently. It includes site speed, mobile responsiveness, XML sitemaps, robots.txt, structured data, and HTTPS.
Example: A web developer implements lazy loading for images, compresses CSS and JavaScript files, and adds schema markup to product pages, reducing page load time from 5 seconds to 1.5 seconds.
The underlying purpose or goal behind a user's search query. The four main types are informational (seeking knowledge), navigational (finding a specific site), transactional (ready to purchase), and commercial investigation (comparing options before buying).
Example: The query 'best running shoes 2026' indicates commercial investigation intent, so Google prioritizes comparison articles and review roundups rather than individual product pages.
A metric developed by Moz that predicts how likely a website is to rank in search engine result pages. It is scored on a scale of 1 to 100, based on factors like the number and quality of backlinks pointing to the domain.
Example: A newly launched blog with a domain authority of 12 will generally struggle to outrank an established news site with a domain authority of 85 for competitive keywords.
Any element on a search engine results page that goes beyond the traditional organic blue link listings. These include featured snippets, knowledge panels, local packs, image carousels, People Also Ask boxes, and video results.
Example: When searching 'how to tie a tie,' Google displays a featured snippet with step-by-step instructions at the top of the page, above all standard organic results.
The two-step process by which search engines discover and store web content. Crawling involves automated bots (spiders) following links to find pages, while indexing involves analyzing and storing page content in a massive database for retrieval.
Example: Googlebot crawls a new blog post by following an internal link from the homepage, then indexes it in Google's database so it can appear in relevant search results within days.
More terms are available in the glossary.
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