How to remove Google Ads

I’m using blog.com and have a google ad on my pages. I find this annoying and want it gone. I have been searching with my father for an hour where we can turn it off. On this forum there is spoken of doing that in the code but we can’t even find where to access the code!

Do you know how to turn off Google Ads and where we can find the source code of my page?

My site is: marcelandjoyce.blog.com