Depth of Content Affects Crawl Rates
If content is buried deep in the site, it might take longer for Google to discover it, or changes. so improving internal linking from higher levels will help pages be crawled faster.
Add Internal Links to Pages with Backlinks to Pass Authority
John says it makes sense to add links from content pages with backlinks, into relevant product or category pages to pass the authority on to those pages.
Structured Markup Doesn't Affect Rankings
Structured markup data doesn’t affect the rankings, only the rich snippets which are displayed.
Use Canonical Tags to Resolve Trailing Slashes
Canonical tags are the best way to deal with trailng slash duplicate pages.
Lazy Loaded Images Won't Be Indexed
Images loaded via lazy load probably won’t get indexed, particularly if they are not showing up in the Fetch and Render tool.