Follow

[Sarah]

To go or come after; -- used in the various senses of thetransitive verb: To pursue; to attend; to accompany; to be a result;to imitate.

[Sarah]

In social media, especially Twitter, it is a subscription of sorts to celebrities, companies, or organizations in order to gain instant access to the thoughts or ideas of said subscription.

Often seen or heard in commercials in which a company will ask consumers to follow them on Twitter.

[Rihanna]

Go or come after (a person or thing proceeding ahead); move or travel behind.