SSD-0008 · Status: stable · Version 1.0 · Reviewed 12 November 2026 · Wikidata Q1958286 (web indexing)
Definition
Indexability is whether a search engine is permitted and able to store a URL in its index — and therefore whether that URL can appear in results at all.
可索引性是指搜尋引擎是否被允許、且有能力把某個網址存入其索引，也就是該網址能否出現在搜尋結果中。
In practice
Indexability is a yes/no gate, separate from ranking. A URL passes only if it is crawlable, not blocked by a noindex directive, not a duplicate that a canonical tag points elsewhere, and returns a successful status code. Most “we do not rank” problems are actually “we are not indexed” problems, and the fastest diagnosis is one question in Search Console: is this URL indexed, and if not, which of the four gates closed. Indexed does not mean visible — a page can be indexed and rank on page nine.
可索引性是「是／否」的關卡，與排名分開。一個網址要通過，必須可被檢索、沒有被 noindex 指令阻擋、不是被 canonical 指向別處的重複頁、並回傳成功狀態碼。大部分「我們沒有排名」的問題，其實是「我們沒有被索引」；最快的診斷是在 Search Console 問一條：這個網址有無被索引，若無，是四道閘哪一道關了。被索引不等於被看見——頁面可以被索引，然後排在第九頁。
What it is not
- Not ranking. Indexing is inclusion; ranking is order. A page can win one and lose the other.
- Not crawlability. A page can be crawled successfully and still excluded.
- Not permanent. Index status changes without notification, which is why monitoring matters more than a one-off audit.
Status
Stable. The gate has existed as long as indexes have. The gates themselves have multiplied — canonical consolidation and AI-specific inclusion rules now sit alongside the original crawl and noindex controls.
Identity
- Wikidata: Q1958286 — web indexing (nearest item; “indexability” as a property has no item)
- English aliases: indexable; indexed status; inclusion
- 中文正名：可索引性／索引收錄（香港、台灣）；中國大陸作「可索引性」
- Primary official source: Google crawling and indexing overview
Related terms
Sources
- Google Search Central, crawling and indexing documentation, developers.google.com/search/docs/crawling-indexing (accessed 12 November 2026).
- Wikidata, item Q1958286 “web indexing” (accessed 12 November 2026).