Google gave really only two SEO focused sessions at I/O this year, although, Google published all the sessions they thought SEOs and webmasters would care about.
One session announced something new around JavaScript crawling and indexing named Dynamic Rendering, which I hope to cover next week. The session covers a lot around crawling and indexing, a lot of the issues with JavaScript and how Dynamic Rendering can help. The session description:
This talk was given by Tom Greenaway and John Mueller of Google:
The next one is more of a basic overview on SEO and search. The session description is below but I believe Google summed some of it up in this blog post.
This talk was given by Mariya Moeva and John Mueller:
Forum discussion at Twitter.