Looking at the ads on a course materials post, none of them seemed very relevant, they were on books and courses, but on completely different topics. The description was “my courses and books” and the keywords are “courses books real estate principles practice”. Just to check, I added “Real Estate” to the description (”My Real Estate courses and books”). Bam! Immediately all the ads grew in relevance, all were about Real Estate exams and courses. I know changing the title to include those words will have an even greater effec, but when it comes to content, I’d rather keep things clean.

Update: Simply changing the order of the keywords and description on this post: moving “niche blog”, “meta description”, and “ads” to the front and “category label” to the back changed the ads from office supplies to webpage optimizations on this post. I love how you can see results right away.