How change that ‘Netlify’ branding shown in the picture?
Get a custom domain 
Google is showing the title from netlify.app since you’re using a subdomain. This is not something we can change or fix for you.
I’m talking about this ‘Netlify’, there’s nothing about subdomain. Tell me how to change that please.
That’s what I’ve answered. Here’s another thread: Why does my website show up with the title Netlify on Google? - Support - Netlify Support Forums
This is not a Netlify problem and not something we can fix. You need a custom domain so Google treats this as a separate site.