Are you talking about the category? Because this is the first time I asked about a feature and I didn’t know which category to use.
@Falco thank you for the link. This plugin’s idea is good but this only pins the post to the top. Although, the idea is to show the post at multiple places rather than just at the top. Means, when a person is scrolling a list of posts then after every 15 or 20 posts he should see a “sponsored post”. That way even if multiple people pay for such ads then also the top of the list won’t be filled with just sponsored posts.