Notes from the Google Webmaster Hangout on the 7th of September 2018.
Above the Fold Ads Can be Problematic For Google
Above the fold ads can be problematic for Google, especially if users aren’t easily able to find the body content.
Google Displays Different Date Types Depending on Which is Most Relevant
Google’s algorithms decide to show the last modification date or the original publication date depending on which is deemed more relevant. For example, the last modification date might be more useful if something has significantly changed on the page.
Content in HTML Treated the Same Regardless of Whether it's Visible by Default
From Google’s perspective, there is no difference if secondary content is hidden by default or included at the bottom of the page and navigated to by an anchor link, as long as the content is in the HTML.
Google Recrawls Indexed AMP Pages to Update Cache
If Google find an AMP page that has already been indexed, a recrawl of that page will be triggered after a period of time to update the AMP cache.
Crawl Stats in GSC Can Indicate if Googlebot is Crawling Cautiously
Googlebot is more cautious about crawling sites if it detects the site’s server is struggling. The ‘number of pages crawled’ graph in GSC is a good way of diagnosing this crawl behaviour.
Average Response Times >1,000ms Can Limit Googlebot's Crawling of a Site
John recommends that the average response time in GSC crawl stats should be around 100ms. A response time closer to 1,000ms could mean Googlebot isn’t able to crawl as much of a site as it ideally would.
Hreflang Alternates Can Still be Shown in Search While Technically Non-indexable Duplicates
Pages identified as duplicates which are not technically indexed may still be shown in search if they are an alternate hreflang version which is similar to the canonical version.
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After Indexing Google Checks to See if a More Relevant Page Can Be Swapped in
After pages are added into Google’s index, it then checks if there are any different URLs that should be swapped in because they are a better fit for the user.
Position Property Needed For Schema.org Breadcrumbs
Breadcrumbs in Schema.org need information about position so Google can understand the order of items and pick them up as clean breadcrumbs.
Google May Consider Merging Information From Quality Rater & Webmaster Guidelines
John said that Google may consider merging information from the Quality Rater Guidelines with their Webmaster Guidelines in the future.