When you start a new WordPress blog, you are not going to have too many categories and tags. But as you add content to your site over time, they are going to add up. Established blogs are better off giving their visitors the chance to filter their content by tag or category. That’s what the Cat + Tag Filter plugin offers. It adds a widget to your website which lets your readers filter your posts by category or tag.
This plugin may prove quite useful for sites with hundreds of categories and tags. All you have to do is install this plugin and drop the appropriate widget to your sidebar. You do have the option to exclude certain tags and categories. The logical operator for multiple choices can be modified as well.
Cat + Tag Filter is pretty handy for established sites with a ton of tags and categories. It gives your visitors more control on how they can consume your content. You won’t have to get your hands dirty with PHP functions to do this which is nice.