how to remove viruses from my MacBook

I feel there are viruses in my MacBook how to remove it

Not possible. There are no known viruses designed for macOS.

You most likely installed Adware, or possibly some other form of malware.

Etrecheck can help you remove Adware you have installed.

MacOS has built in anti-virus. keep your Mac updated to the latest instance of your OS. Anti-Virus products can cause false flags or conflicts. If you have a concern about malware bytes https://www.malwarebytes.com and https://etrecheck.com

etrecheck allows you to post an anonymous system report here and the volunteers can take a closer look.