SEM (Search Engine Marketing) Glossary:

• PPC (pay-per-click): a type of online advertising where the advertiser pays a fee each time one of their ads is clicked.
• CPC (cost-per-click): the amount an advertiser pays each time one of their ads is clicked.
• CPM (cost-per-thousand impressions): the amount an advertiser pays for 1,000 impressions of their ad.
• CTR (click-through rate): the percentage of people who click on an ad after seeing it.
• Conversion rate: the percentage of people who complete a desired action (such as making a purchase) after clicking on an ad.
• Keyword research: the process of finding and selecting keywords to target in an SEM campaign.
• Ad group: a set of related ads that share the same keywords.
• Landing page: the webpage that someone is directed to after clicking on an ad.
• Remarketing: the practice of showing ads to people who have previously visited a website.
• A/B testing: the practice of comparing two versions of an ad to see which one performs better.