Server errors, more correctly server header status codes, can damage SEO efforts, so it is important to understand how these work and what they indicate to the search engines.
When your server gets a request to display one of your website’s pages from a visitor’s web browser, the server returns a server header status code to the visitor’s web browser, saying that the page is okay ‘HTTP/1.1 200 OK’.
This is accompanied by other information, such as the HTML code, which the visitor’s web browser uses to show the specific web page and its content.
This is however, unless there is an issue with the page. Each code delivers a different message and these can directly impact the page’s ranking with the search engines.