Search Engine Marketing generally refers to cost per click advertising which provides businesses with a method of reaching potential customers immediately, without the typical wait associated with SEO activity.
SEM can be used as a short term strategy to attract visitors while waiting for search engine optimisation to take effect or as an additional channel to reach potential customers. Ads will only be shown to users who are actively searching for products and services you choose to bid on, and you’ll only be charged if they click on your ad. You can target ads to countries or territories, or to specific regions and cities. You can even control what times and days your ads are displayed.