What is Index Selection?
The engine’s choice of which crawled pages to keep, favoring unique value and quality signals. Selection is why thin duplicates vanish from the index while consolidated canonicals survive.
Related terms
Indexing
Storing and organizing crawled pages so they can be retrieved for queries. Indexing is selective: crawled does not mean indexed, and indexed does not mean ranking.
Index Bloat
Search indexes filling with low-value URLs: facets, parameters, tag archives, thin search pages. Bloat wastes crawl budget and dilutes quality signals, so audits segment the index by template and prune deliberately.
Content Consolidation
Merging overlapping pages into one authoritative URL with 301s and link updates. Consolidation resolves cannibalization and gives one page the combined relevance and links.
Technical SEO
The crawling, indexing, rendering, and performance work that lets search engines reach, understand, and serve your pages. It covers directives, architecture, speed, and structured data rather than words on the page.
Crawling
How search-engine bots discover pages by following links, sitemaps, and directives. If a URL is never crawled, it cannot be indexed no matter how good its content is.
Crawl Budget
The number of pages a search engine will crawl on a site in a given period, driven by server capacity and demand signals. Large or slow sites must spend it on indexable, valuable URLs.