How do I edit the filters on the blog listing page?

The filter bar is populated with Tags added to your blog posts, to edit or remove the options shown you will need to edit the Tags directly

Open Marketing → Website → Blog and change the view to Tags:

From the Tags page, you can complete the following actions:

• Add new tag
• Edit existing Tag name and Language
• Create multi-language variation
• Add to a multi-language group
• Combine with another tag
• Delete

You can also Edit columns to show the Blogs and Language to make managing Tags easier: