Sort:  

On Facebook, the only way I know to do it is to set up a Facebook page and use PayPal to pay for it. Once the Facebook page has been created, running an ad is very easy. The minimum cost is $1 per day.

I have not run advertising on other platforms, but I am aware that Twitter has an option to promote a Tweet.

Best to make contact with @remlaps and @arie.steem who have been doing advertising on Facebook.

@pennsif thank You for guidence