Site optimization is very important and many experts are working in this field to earn money by doing so, different factors are effective in SEO, such as meta description, site loading speed, site map and etc.Another important factor that affects the optimization of the site are the links that cause a site to gain more credibility, there are different types of links each of which acts as a vote in the site ranking, more quality backlinks increases the ranking of your website in the search results page, but just as quality backlinks are effective in SEO, incorrect backlinks has impact on it, which causes getting a 404 error by clicking on it, which by repeating this for the user, he/she will leave the site and get a negative user experience, and if it happens to multiple users, it will eventually cause the site to get low website ranking, and you do not get the desired results, The same is also true for internal links, if the linking is not done properly, clicking on the link will cause the user to get a 404 error as well as a negative experience.

What is a link?

Links allow you to click on it to be redirected to another page and allow users to access different pages easily.

Link types:

1- Internal link:

One of the key points in the internal SEO of the site is the use of internal links, which causes the user to view other pages of the site and receive the answer to their questions as soon as possible, which causes the search engine to consider the site credible and gives a high ranking to it.

2- External link:

An external link is actually a link that refers to an external domain, in other words, you can say that the links you receive from other websites are in fact external links, and also the links which someone else has given to your site is considered as an external link because they also receive external links from your site, which increases the value and credibility of it because Google pays more attention to others opinion about your website more.

In other words, any text or image that you click on to take you to another page is called a link, and if another site or domain links to one of your pages, it is called a backlink , in general, there are two types of backlinks, which we will discuss in the following, links can also be duplicate and duplicate. 

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