Strating from Friday, Facebook will be letting users pay to ensure that messages posted by friends at the social network get more attention.

The feature comes less than four months after Facebook began letting members pay to have personal posts get priority in feeds seen by friends.

"Now, in addition to promoting your own posts, you can promote a friend's post, such as a fundraising or celebration announcement," Facebook said in a blog post.

"It's important to know that this feature respects the privacy of the original poster - it will promote to everyone who originally saw it."

The feature is only available for people with fewer than 5,000 friends at the social network, according to Facebook.