When you enter an address in the address bar of your browser or click on a link, the browser requests information from a web server to view the requested web page for you. Sometimes there is a problem and then you get an HTTP status code that simply shows the status of your request.
We sometimes talk about different HTTP status because they are important for search engine optimisation and it can easily get a little confusing for those who do not know what the numbers mean. Because we compiled the 5 most important status codes for SEO .
200 - OK
HTTP status 200 simply means that the web page is loaded as it should and it is live.
When paging pages or moving information on the site to another URL, it is important to redirect the old page to the new one at the same time. This is because both visitors and crawlers will find the new page and not be lost on the road. Previously, 301 redirect has been the only redirect that brought about linkage.
But Google has now assumed that all 3xx brings together linkage. However, it is still best to use 301 redirect because we do not know how other search engines handle redirects.
Some believe that permanently means you can never remove or redirect, but it is not. Permanent means in this case that it is meant that the page should not be longer and that the information has been posted to another page instead. With a 301 redirect, you will see both visitors and crawlers wherever they go.
It works a bit like an address change at the Post. Until next address change, this is considered your permanent address.
302 - Temporary Redirect (temporary redirect)
Actually, this status code is called Found but in the SEO world, we usually call it temporary redirect or temporary redirection in Swedish. A 302 redirect is sometimes used when the page is temporarily down for update or the like. You can compare it a bit like getting your mail sent to the summer cottage during your holiday. Your regular address is still available, but you do not live there temporarily and the mail will be sent elsewhere for a shorter period.
Sometimes we see that it is also used to redirect deleted pages. Google has previously not forwarded linking power through 302 redirects, but now they have said that all 3xx redirects send forward linking power. But Google is just a search engine and 302 is still web standard for temporary redirects. Therefore, it's best to only use 302 redirects on these occasions.
404 - Not Found
When a page is not found on the server, you get back the status code 404. In order not to lose visitors, it's important to have a good 404 page so that the rejection rate is not affected too much on your site. A good 404 page should contain the ability to search the site and click on to the homepage. It can also contain image links to important content.
Be sure to check if any pages on the site provide an HTTP status 404. These should then be redirected to another relevant page on the site to take advantage of all linkage and reduce the risk of dropout.
500 - Internal Server Error
HTTP Status 500 is the code that is returned if the server encountered an unexpected error and can not meet the request. It is a general status code which means there is no more information about the error. Most web servers log in like this to help troubleshoot.
Some common errors that give status code 500 are incorrect write permissions on files and folders on the server or plugin conflicts if you run WordPress or similar Content Management System (CMS).