How do I disable specific notifications?

I keep getting this annoying message at least once a day about my network not being safe because my password is weak and telling me I should install Norton VPN. I know my network passwords (have 2) are VERY safe, and I don't see how Norton can determine what they are anyway, so how do they know they are weak ?. Given this, I consider this message a SALES PITCH and want to stop it. How do I do this ?

Win 10, up to date N360.