Another way to say “Paid Search Marketing”.
So SEM (Search Engine Marketing) is the process of gaining website traffic by purchasing ads on search engines.
Common terms also used to refer to SEM activities:
paid search ads
paid search advertising
PPC (pay-per-call) – some ads, particularly those served to mobile search users, may be charged by the number of clicks that resulted in a direct call from a smartphone.
CPM (cost-per-thousand impressions)
Search ads are sold on a CPC / PPC basis, but some advertising options may also be sold on a CPM basis.
Google AdWords is by many measures the most popular paid search platform used by search marketers, followed by Bing Ads, which also serves a significant portion of ads on Yahoo.
Beyond that, there are a number of “2nd tier PPC platforms” as well as PPC advertising options on the major social networks.
In addition to covering general paid search trends, you can find the most recent news about SEM and helpful tips to get started with PPC ads on the major search marketing platforms below:
Each platform offers its own getting started guides and helpful tutorials. Another beginner resource is Google’s Insider’s Guide To AdWords (PDF). Since the guide was last updated in 2008, the Google AdWords UI (user interface) has changed, along with several features, but the guide may still offer a useful introduction.
In 2014, Google AdWords released a new video about how AdWords PPC auctions work: