How do I change the name that appears in the webpage tab on the top of the screen?

How do I change the name that appears in the webpage tab on the top of the screen? I recently changed my business name, and on the tab at the top of the page, the old business name still appears. How do I change it, so that the current business name shows up?

Please see picture below, the name on the white tab on the top right (that you click on to go between the windows you have open) does not match the name on the website. I'd like it to say ADRISA Automation Inc. but instead it says AMDS - Automation Mechanical Design Services. How do I change this to say ADRISA Automation Inc.?

Thank you.