In WordPress, “Structure tags” refer to the placeholders used to define the permalink structure for posts, pages, and other content types. Permalinks are the permanent URLs for your content and can be customized to include information such as the date, title, and category of the content.
WordPress allows you to use a combination of structure tags to create your own custom permalink structure. The default structure tags are %year%, %day%, %hour%, %minute%, %second%, %post_id%, %postname%, %category% and %author%.
For example, the permalink structure /%year%/%monthnum%/%day%/%postname%/ would create a URL for a post that includes the year, month, day, and post name. So your post URL will be like www.example.com/2023/05/28/this-is-a-post
Customizing permalinks using structure tags can improve the readability and SEO of your website, but it is important to choose a structure that is simple and easy to remember.