The search engine will always analyze websites to determine how relevant and important their information and content is. And of course, determine if they follow the parameters and factors that will put a website at the top of the searches. In simpler words, engines will scan your website and get to know it to come to a conclusion about the content and what it is about. For a website to be positioned at the top, you can do several things to help yours to make it and one of them more than a year ago, was to write a short text promoting your post or article, maybe giving some information away of what it is about.
In this text, you used to write a very small quote or sentence that promoted the link or website that was available to access. However, it changed and now, you will notice that the short text usually answers the question in the name of the website or article nowadays, instead of or promoting or inviting to take the action of clicking on the link. As you can see, SEO is not static and is always updated is crucial for business. Something you need to keep in mind is that SEO is also about making changes to your website to make it more useful and attractive for users and of course, the search engine itself.
The concept of how it works is pretty basic: the search engines want to make sure that users are getting the most relevant and useful information. At the same time, users will also get a website they enjoy by just looking at it. Everything plays a role and different aspects involve SEO and how it particularly works.