Opinions expressed by Entrepreneur contributors are their own. I’ve always been a little nonplussed by those who imagine a distinction between salespeople and ad writers. Essentially, they do the same ...

But for commercial TV channels, adverts have been their main income source for the past 70 years. The first advert on UK television was for Gibbs SR toothpaste, broadcast on September 22, 1955.

During its third-quarter earnings call on Tuesday, Snap Inc. SNAP highlighted strong growth in daily active users and promising early results from its new ad formats and “Simple Snapchat” layout. What ...