Pinned tweets (the ability to "sticky" one of your tweets to the top of your Twitter feed for an indefinite period) was introduced earlier this year "so [that] it’s easy for your followers to see what you’re all about."  

While this is true, I'd argue that pinned tweets are even more powerful as a way to grab the attention of non-followers; anybody who happens upon your Twitter feed, and who you have the opportunity to influence with a non-moving "banner," guaranteed to be the first thing they see. Big businesses utilise pinned tweets in all manner of ways and for many different purposes, so let's take a look at some real life examples to help inspire your own activity: