Search Engine Marketing (SEM) is a way to make your website more visible on search engines like Google or Bing by using paid advertising. It's like putting up a billboard on a busy highway where lots of people can see it. With SEM, you create ads and bid on specific keywords related to your business. When someone searches for those keywords, your ad might appear at the top or bottom of the search results page. SEM is great because it can help you get more visitors to your website quickly, target the right audience, and track how well your ads are performing. Plus, you only pay when someone clicks on your ad, so it's cost-effective too. Overall, SEM is a smart way to boost your online visibility and attract more customers to your website.