Twitter ads are served on an auction system. Advertising campaigns on Twitter can be customized to fit your budget and there is no minimum spend requirement so it is an accessible social media marketing tool for both large and small businesses.
You bid on available ad space and how much you want to pay for a “billable action” taken by your chosen audience, on your Twitter ads. The more you bid, the more chance you have of getting in front of your target.
Promoted Tweets are the lower cost option, ranging from $0.50 to $2.00, while a promoted account can cost between $2.00 - $4.00. Promoting a trend is by far the most exorbitant option, costing $200,000 per day.