In the two-phase indexing by Google, an initial crawl will happen at first, followed by a second one just a few days later. In the second wave of indexing, canonicals and metadata won’t be checked anymore. Let’s say that these things haven’t been rendered during the first phase. There’ll be a possibility that Googlebot will miss them completely, and this affects your search engine optimisation efforts, particularly the indexing and ranking of your web pages.
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