There is a big difference between solo ads and spam.

Solo ads are a form of paid advertising where you contact an email list owner and purchase a solo ad. This is different from spam, which is an unsolicited email sent to many people.

When you send a solo ad, you are guaranteed that the recipients have opted in to receive messages from marketers like you. They are more likely to be interested in what you have to say and more likely to click through on your offer.

On the other hand, spam is not targeted and is often sent to people who have never agreed to receive messages from the sender. As a result, people are much less likely to click on links or offers in spam emails.