This is a new feature of v5 build 3499.
#2) Where can I go to learn more about what to do with the Supports Query? Do I need to mess with this and if so, what support rules should I add? Do I need to add one about flex if I'm using flex in the site, etc., etc.? Don't browsers see what my site is using anyway and either automatically accomodate or adjust for it?
#3) Where can I learn more about Structure Data? There is no schema type for my business. I get the feeling I should do it seperately for each page (or just important pages?) but I really have no idea. Each schema type has it's own properties and, since my type of company isn't on there, I'm not sure how I can use this for my site. Even the About Page type had me confused, and I have an About page.
Any tutorials or places on the web that would help me understand how I might use this feature to benefit my sites?
Thanks!