How to redirect a non member to an advertisement page?

Hello

I’m developing a membership site and I would like to know how to direct a non member that click on a visible post or page to an advertisement page?

I have an example

On the site https://keikos-cake.com/ you need to be a memeber and access to its recipes posts but if you’re not a member you get this when clicking on the post:

“https://keikos-cake.com/members-only/?wlfrom=%2Frecipes%2Fbanana-walnut-chiffon-cake%2F”

Anyone knows how I do that to my site besides having groups restrictions?

Thank you