Paid advertising is a great way to guide more traffic to your site, but it can become expensive. How do you make sure you are getting the most out of your paid ads?You’ve probably come across the term “online advertising” before in some form or another. It’s sometimes referred to as Search Engine Marketing (SEM), Social Media Optimization(SMO), paid channel marketing, or pay-per-click (PPC) marketing. The terms are often used interchangeably to describe what essentially the same concept – purchased is or “rented” traffic through online ads.Paid Channel Pricing Models – CPMs are billed at a flat rate per 1,000 “impressions”. An impression is a measure of the number of times an ad is displayed or has left an impression on a user, regardless if it was actually clicked on or not. You’re not charged additionally for any clicks that the ad receives.