Is displaying tags and categories on recent posts unnecessary?

Question

I am creating an online community platform where users can post blog-like items. I currently have made a design that displays recent posts, along with a sidebar where users can filter existing posts using categories and tags. Clicking on a posts' title will bring the user to the full article.

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The idea is that when a user checks, for example, the tutorial category along with the Magento 2 tag, only posts with at least these types are displayed and all other items will be hidden, like this picture:

As you can see these categories and tags are also featured in the recent posts. Users can also click on these tags to filter the items on the platform accordingly.

In this case, would it usability-wise be a good idea to also include these tags on recent posts, or does it seem unnecessary and/or confusing should I stick with displaying categories and tags on the sidebar only?

Edit: As DasBeasto asked in the comments, the filtered posts are those that have at least the selected tags.

Answer 1

Do you have plans for anything other than desktop?

Since designers have little control over viewport size, that filter bar may be need to be either minimized, or become adaptive to perhaps a horizontal filter bar. In either case, the filter takes up less (or no) space.

Even in a full screen view it's hard to keep track of the filtered state.

By keeping categories and tags visible in the scrolling article/tutorial teasers, users can still useful information. You can do this with some subtle design. Coloring the categories might be overload in this case because you have to interpret the colors as well.

As an example, here's how mashable puts a category in gray text above the article title:

Categories vs Tags

Right now, it appears you're treating Categories and tags as the same visually.

Categories are usually discreet and singular. In most editorial sites they represent a news section. An article can be in only one category, but it can have multiple tags associated with it. There are some sites that seem to mix the two without consequence, but they're often graphically depicted differently.

I see that you have a list view, but I assume there's a detail page for each of these items. Since you seem to have a site geared towards reading and learning (content), you'll often see on article detail pages a pattern of the category placed in a subtle way close to the article title. This saves the user time if he / she knows they're in the right place.

Tags are often clustered at the end of the article, where the reader can click and drill into related concepts.