If you're working on upgrading the quality of your digital marketing campaigns, you've probably already learned the value of strategies like search engine optimization (SEO) and web design.

But as valuable as those organic advertising methods are, users who click on a pay-per-click (PPC) ad are 50% more likely to purchase than those who visit your site via organic content. For that reason, you can't afford to miss out on PPC advertising.

But which PPC platform will drive the best results for your business? Even if you understand everything about how PPC works, you still may not know where to go to start using it.

The good news, though, is that there are plenty of paid advertising platforms to choose from.

Below is a list of 18 of the top ad networks you can use for your PPC campaign.