We talk a lot about metadata at ieInteractive because it can substantially impact your click through rate. It's what users see in search results, and can persuade a user to click on your search result over your competitors. Here's some information to help you wrap your head around metadata - including what it is, how it works and why it matters.
Google Site Search, a product offered by Google since 2008, discontinued sale and renewal of the product since April of 2017, and has completely shut the product down as of April 1, 2018. This product enabled web publishers to use leading search technology on their website.