What is the difference between Marketing and Advertising?

I’m a small business owner and have been advertising for a number of years now on Google. I’ve recently read a couple of books by Seth Godin who talks about marketing but not advertising. His thing is that you should market to those in a worldview that first within your specific niche of folks you want to reach.

This got me thinking about the difference between marketing and advertising. I have no idea what the difference is but there appears to be several differences.

I’ve read a lot of books on advertising but I guess I’ve always thought these two things were the same .

I’ll have more questions based on what these differences are but I think I’m missing the boat in my advertising because I’ve missed the marketing part.

Thanks for the advice!