1) People are using them

When you look at the billions of searches being made on the major search engines there is one simple conclusion you can make. People use them. They use them a lot.

3) You don't pay to add your site

Search engines automatically crawl your site and virtually every other website on the Internet. If they like what they see you'll show up in the results.

5) Website content is compared

When you have better content, more information, a compelling website, you get a better rank in search results. It's automatic, you need a better website than competitors for search engines to like you more.  

2) They're free to your customers

Free for everyone, search engines take the information on websites and organize it into a searchable database, and with an Internet connection it's all absolutely free.

4) They control how you rank in results

Search engines control the position you're in when a customer searches for content that is relevant to your website. The top results get clicked on the most.