How to Exclue a Category from worpdress homepage or archive page
1.Install and Activate Ultimate Category Excluder plugin.
Upon activation, you’ll need to go to Settings » Category Excluder page. It will display all the categories that are available on your WordPress blog.
From here, you can simply check one or multiple categories under the ‘Exclude from front page’ column. If you want, then you can also exclude the category from RSS feeds, archives, or even from WordPress search.
Now you can visit your website to see that the posts from the selected categories are excluded from the front page or archive page.