The cost of Twitter ads varies significantly based on various factors, such as the type of ad you want to create, your target audience, and the bidding strategy you choose. Generally, promoted tweets can cost anywhere from $0.50 to $2.00 per engagement, while promoted accounts may range from $2.00 to $4.00 per follower. Also, the average cost per impression (CPM) on Twitter is $6.46 per 1000 impressions. Twitter uses an auction-based system, so bid placements influence the cost greatly.