What Twitter service offers promotion on a cost-per-follower basis?

How can you appear in a user's 'Who to follow' section?

How should you deal with Trolls?

To engage with your audience you need to:

What was the original reason for Twitter constraining the number of characters per tweet?

Where will promoted tweets show up for viewers you have targeted?

Which actions may be taken on a campaign or advertiser upon violation of Twitter's policies, Rules and Terms of Service?

Which image formats is not valid for your profile photo, header photo, and background photo in Twitter?

'#' symbol is used on Twitter to _________________________.

This question is based upon the figure shown below: The figure given above is the screenshot of Twitter being used by a user through a Smartphone. In the figure, which of the given symbols is used to view connect timeline?

This question is based upon the figure shown belwo: Which is the use of the image given above in Twitter?