Crawling is that the method of associate engine requesting — and with success downloading — a novel URL. Obstacles to creeping embody no links to a URL, server time period, robots exclusion, or victimization links (such as some JavaScript links) from that bots cannot notice a legitimate URL.
Indexing is that the results of roaring creeping. I contemplate a URL to be indexed (by Google) once associate info: or cache: question produces a result, signifying the URL’s presence within the Google index. Obstacles to categorization will embody duplication (the engine would possibly commit to index only 1 version of content that it finds several nearly identical URLs), unreliable server delivery (the engine could commit to not index a page that it will access throughout solely common fraction of its attempts), and so on.
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