What is the best way to deal with 404 not found pages?

i am facing 404 not found pages in my web site search console please guide me how can i deal with these Pages ?

When the page is showing 404, it means whatever you’re searching for does not exist. There’s really no way to “deal” with it, you have to be sure what you’re looking for actually exist (on your origin).

can you please check 404 pages of this site : whatsmody