What Is the Google Algorithm?
The Google algorithm is the system Google uses to evaluate and rank the billions of pages in its index against a given search query, deciding what order results appear in.
How It Ranks Pages
Rather than one single formula, “the algorithm” is really a combination of hundreds of interacting systems and signals — relevance matching, authority and trust signals like backlinks, content quality assessments, page experience factors like speed and mobile usability, and increasingly, machine learning systems like RankBrain that help interpret ambiguous queries.
Major Updates That Have Shaped It
Google regularly refines its algorithm through both minor, continuous adjustments and larger named updates: Panda (content quality), Penguin (link spam), Hummingbird (semantic search), Mobile-First Indexing, and periodic broad core updates that can meaningfully reshuffle rankings across entire categories of sites. Because the algorithm evolves constantly, SEO best practice has shifted toward building genuinely useful, well-optimized sites rather than chasing any single ranking “trick.”
