Twitter is a popular social media website that allows users to tweet. Many of these users are actually businesses that promote sales, customer loyalty, and new products through their account. As with most social media outlets, consistency is the key to successful Twitter promotion. Include a hashtag whenever you are having a sale or promotion.
There are many aggregate websites that gather all of the day's tweets that include keywords. Also regularly include any other popular search terms that people use to find your website along with a hashtag on your daily tweets. Most Twitter users receive an email when someone new is following them.
Add a few people every day, and many people will choose to follow you in turn. Promoted Tweets appear on top of the screen when a user searches for related topics.