We don’t sell ads, but we allow stream publishers to embed ads in their notes, mainly in the form of text or images. There are no video or audio ads in those stream.
We call the different classes of notes on the left side “forms”, and one of those forms is called “publicity”. At some point, Publicity streams will be free to subscribe, but the publishers of those streams will pay for every subscriber. That makes them essentially ads, except you have to actively sign up for them. These will be useful for keeping up to date on the latest information from companies you care about (if any).
From our community guidelines: While we respect the right to free speech, we do not want to be a place where speech is used to incite hate or defame other people. You are free to create your own website where you can call people names and insult them and make up stories about them, but that's not why we created Notd. Criticism is acceptable, but personal attacks are not welcome.
Also, this isn't the place to sell porn.
And, we probably need to mention this often, you must have the right to publish content you are posting. Usually that means you are the copyright owner, but it also means you shouldn't be posting illegally obtained content.
You can read more in our Terms of Service.