I have a WordPress website (lets say example.com) which is basically a blog with weekly educational posts about a specific subject. I also have a subdomain (lets say courses.example.com) which offers online courses about the exact topics I write in my blog.
So I want to put a link (courses.example.com) inside my every blog posts in example.com.
Does it hurt my SEO that every one of my posts on example.com has the same link to the courses.example.com?
If yes, is there any recommendation?
My theme gives me the option to put ads or banners before and after my post content, but I prefer to add it in a suitable position inside my content.