What security product do you use for your MacBook Pro?

No Anti-Virus software or so-called “cleaning” apps are needed or recommended for Mac OS. They can conflict with Mac's own built-in security. At best they will slow your Mac by using unnecessary resources and at worst will bork your entire system. Your Mac has all the built-in protection you need.

macOS - Security - Apple

Cranium A/V. The macOS is not Windoze.

macOS built-in security.

Malwarebytes for Mac (ad/malware)

Use the built-in security provided by the operating system.

Effective defenses against malware and ot… - Apple Community

I use my brain.

Just properly setting up macOS itself and common sense.

The biggest being, "If you didn't ask for it, don't accept it".

Keeping all of the Apple software current with releases from Apple.

Avoiding all third party apps that claim they will increase security. They lie.