One of MANY links https://www.honorhealth.com/healthy-living/are-all-colon-polyps-precancerous-or-worse

From the above:

Completely preventable cancer
The good news is that, with advances in screenings, colon cancer is preventable. Here’s what we know:

As often as 40% of the time, a precancerous polyp — frequently a type called an adenoma — is found during a screening colonoscopy.
Colon cancer is found during only in about 40 out of 10,000 screening colonoscopies, Dr. Sand said.
Colonoscopy is the only cancer screening technique that can actually prevent cancer and not just detect it.
Removing a precancerous or benign polyp eliminates the risk of colon or rectal cancer from developing from that growth.