Example of a "breadcrumb navigation" [Home>Category>Article]
Other ways to improve internal linking
You can clearly improve the internal linking by using a Sitemap improve. With the Sitemap there are also many different approaches. For search engines like Google it is recommended to use a Sitemap in the form of an .XML file. For this you can also check again on Google the information regarding the Sitemap read up.
For your visitors it is recommended to have a Sitemap in the form of a separate subpage (it does not matter whether the file extension is .html or .php). But also the use of a categorically ordered directory has clear advantages. But you should make sure that they are accessible so that visitors can find them. If necessary, you set a link from the sidebar or link the Keyword directly from the Content.
You can find helpful plugins for SEO & internal linking in this post.
Internal linking error
You can also make mistakes with internal linking, make sure that you do not use images or graphics for your navigation. If it is indispensable, then the use of alt tags should be considered. Also important is, that if you use links from the Content does not use too long or stuffed with keywords Title tags to be created. This could be used as a Keyword-This would be considered as spam by the search engines and would miss the target. Also, do not overdo it with the number of links set in the content, it brings nothing if you have one and the same Keyword linked several times in the article.
If you have something to say about internal linking, please write a comment with further links.