An article directory lists articles from various authors on certain subjects. Within these posts, it is possible to place a link to your own website. These links are usually evaluated as particularly good by search engines, provided they are relevant to the topic. However, an article should not appear in several article directories with the same wording in order to avoid duplicate content. As an author, you can also improve the expert status in your field by publishing many different posts in article directories. In any case, the copyrights (which only the author has) are to be observed for publications. However, rights of use can be granted from a page through corresponding contractual agreements.