A verified Twitter account receives a blue check icon to indicate that the creator of these Tweets is a legitimate source. Verified accounts include public figures and those who may have experienced identity confusion on Twitter.
A username (or handle) is how you're identified on Twitter, and is always preceded immediately by the @ symbol. For instance, Twitter Support is @TwitterSupport.
Who to follow is an automated list of recommended accounts we think you might find interesting, based on the types of accounts you already follow and who those people follow.