website Title and notification

I have 2 questions:

1: I want to change the title of my website “Meel Bijendra -” next to it. As you can see in the screenshot: https://pasteboard.co/HKnvfYMu76CF.png So how will this happen?

2: I have to put notification so that if there is a new post on the website, then those who have subscribed will get the notification of the new post. I used plugin but website speed slow so please provide css code.

The page I need help with: [log in to see the link]