Below-the-line promotion is the use of promotional methods that can be controlled by the company selling the goods or service, such as in-store offers and direct selling.
Below the line (BTL)  advertising is more one to one, and involves the distribution of pamphlets, handbills, stickers, promotions, brochures placed at point of sale, on the roads through banners and placards. It could also involve product demos and samplings at busy places like malls and market places or residential complexes. For certain markets, like rural markets where the reach of mass media like print or television is limited, BTL marketing with direct consumer outreach programmes do make the most sense.
Other BTL activities could include roadshows, or moving hoardings with the ad of the product, and vehicles with promotional staff interacting with people demonstrating the product and distributing  literature on the product.  BTL advertising is advertising that uses less conventional methods of advertising that the specific channels of advertising that may or may not be used by ATL advertising to promote products and services.
BTL promotion might include direct mail promotional campaigns, PR and sales promotions which are handled directly by the company itself or outsourced to specifically PR agencies and sales promotion agencies and may or not be