Sudden Changes in Traffic Suggests Algorithmic Impact Not a Technical Issue
If you see a sudden drop in traffic on a single day, it’s more likely to be due to an algorithmic update than a technical issue, which would require crawling over a longer period.
Detailed PageRank Optimisation May Be a Wasted Effort
Provided that Google can discover all your pages through internal linking, detailed optimisation of PageRank optimisation is probably a waste of effort.
Google Has Changed its Policy on Treatment of Nollow Links but There Are No Details Yet On Actual Changes
Google has changed its policy on crawling nofollow links, but it’s up to individual Google teams to decide how they will utilise the new policy.
Structured Data Should Be Equivalent for Bots and Users
Structured data on a page should be available to both bots and users, and not delivered conditionally to only bots.
Merging/Splitting Websites May Result in Changed Rankings
Merging multiple websites to a single domain, or splitting a website onto multiple domains is much slower to process, with a less predictable outcome than simply moving a website to a new domain, and may result in different rankings than before.
Link Paginated Pages With Regular Links
Google doesn’t use rel next/prev links, so you should link paginated pages together with regular links. It’s best to have a clear hierarchy where each page links to the next page, instead of linking to many other paginated pages. If you see deeper paginated pages ranking instead of earlier pages, it may be due to the internal linking.
Consolidate Thin Pages to Create Higher Quality Pages
If you have pages which have thin content, consider merging them into few pages to create higher quality pages with more content.
Google Will Not Render Noindex Pages
Google Uses Lab Tests and Field Data (Including AMP Pages) for Page Speed Measurement
Google uses both lab tests as well as field data (what a user sees), which would include AMP page speed.
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