Web hosts store your site on a hard drive that anyone with an internet connection can access.
If you’re using a hosted platform for your website, you have very little control over your hosting. But if you’re using a self-hosted platform like WordPress, it’s up to you to find somewhere to host it.
So how do you choose a good web host for SEO?
Most SEO guides say that dedicated hosting is better than shared hosting. That’s true, but it doesn’t make much difference until your website gets tons of traffic. Cheap hosting from any reputable company is fine for most people; there isn’t much difference in performance between hosts when you’re paying a few dollars a month.