SEM stands for search engine marketing, which basically means paying to show your ads on search engines like Google. Even for very niche businesses, meaning businesses that serve a small or very specific audience, SEM can still work well. The reason is that people searching for something very specific are usually very serious about finding it. A company selling industrial water filters to factories can still run Google Ads and find buyers because those buyers are actively searching. The audience may be smaller, but the quality of leads is often higher. Have you ever run SEM for a niche business, and how did it perform?