Tumblr also offers sponsored web post ads, which are pieces of Tumblr content crafted by advertisers that appear in users’ main dashboard feed, integrated with normal, user-generated content. These Tumblr ads have small dollar signs to mark them as advertising content. In order to post your online ads onto the Tumblr platform, you'll have to become a Tumblr sponsor.
Since guest posting on a popular blog allows you access to an established audience and high domain authority, this practice can sometimes be more beneficial than posting to your own blog. Plus, you can link back to your own website from your article, giving you an inbound link that boosts your domain authority and can increase your own website's ranking in search engines.