1. Add tags for Smaller Topics
You may link to other posts or give your readers suggestions on where they can find more information about a particular topic. Even list some other posts that might interest them at the bottom of each of your new posts to direct them there easily with an internal link.
2. Eliminate Outdated Content
You can delete a post if it isn't up to date and no one reads it. However, you must ensure that all your content has value. Your site will look great if you get rid of old content!
You should be careful, as deleting pages can lead to many 404's. Before you delete any piece of content, make sure to learn how to delete a post properly.
3. Add Subcategories or Tags
You may use tags to ensure that a post has enough links. However, don't make too many tags. Each tag group should contain at least three posts. If you blog about new topics, you should regularly review your tag structure.
Subcategories create an additional layer and a hierarchical structure. Google will find your site easier to understand.
Each category will have fewer posts. A smaller number of posts will make it more likely that each post will get a link from a new post every once in a while. This will ensure that posts don't get lost.
It can be challenging to link to all your similar posts if you have a lot of them. There will be many posts to choose from. Many blog posts will become lost in a flat structure. These posts will have few links, which makes it difficult for your audience to find them.