Search Engine Marketing (SEM) is a form of electronic marketing using paid advertisements to market websites by making them more visible in search results. When you search for something, the websites you see in the middle of the page are the result of SEO that falls In the free e-marketing strategies category, the sites you see at the top and bottom of the page are paid ads on search engines.

SEM search engine marketing is an effective and specific way to increase sales for businesses and companies, where people search for what they want, advertisers (companies) target words related to their products and services and only have to pay if potential customers click on the ad link. This is where the term PPC, which means pay-per-click, is used.

The most important difference between regular ads such as billboards or newspapers and marketing via SEM search engines is that you only pay in the case of getting customers, because your ads appear to your target audience specifically, so the cost of search engine ads will be much less than the cost of traditional ads.

All the methods that are used by search engines to increase website traffic and sales, are only a part of search engine marketing, thus it can be said that SEM also includes SEO.

In fact, SEO is the part of search engine marketing in terms of the goal being for customers to see your company's website on search engines, but SEM is broader than that.