BTL activity means - Below-the-line advertising. BTL activities are more focused and they are directed towards specific groups of customers. The main types of below-the-line advertising systems include direct mail campaigns, social media marketing, trade shows, catalogs, and targeted search engine marketing. Ascend media deliver Below-the-line advertising methods tend to be less expensive and more focused. The major advantage of BTL advertising is that the results of the campaign can be easily tracked.