For your viewing pleasure, the highlights from the Google hangout on 3/24/2017.
Internal links do not need to be bi-directional to emphasis a relationship between pages.
Schema markup errors do not make you rank lower then you would without markup. Schema markup is used to help google better understand a site but is not primarily used for ranking.
There is a good discussion about future possibilities for voice search and voice applications.
Canonical is a signal to google not a directive. Google will not necessarily always choose the version you specify as many signals go into that choice.
Google will change titles when displaying them in search results because they just feel something else fits with the search term better. If you have done a site:url search to check this, Google will show changed titles way more often then when you do a normal keyword search. This may skew your perception of the frequency that changes to title occur.
It could take a month or more to re-crawl any given page such as product pages after content changes. Changes take time to reflect in search results.
Mobile first index
There is no time frame yet for the roll out of the mobile first index. Google’s goal is to make it easy for website owners to transition.
Internal photo links
Photos should have alt text associated with them in order to pass full weight to the linked pages.
Heat mapping can indicate where on a page a user has clicked and how far down the page the user as scrolled. Google does not use heat mapping in ranking.
Structured data manual actions only remove you from rich results. They don’t remove you from search or affect search rankings.
Move to secure site https
Google recommends new sitemaps to help them make the change faster. But Google will pick up 301’s anyway.