HPV (human papilloma virus) causes nearly all cases of cervical cancer. HPV is commonly transmitted without symptoms during sexual intercourse, and as many as up to 4 out of 5 people will carry HPV at some point in their life. Typically the body will clear HPV on its own, but in cases where the virus persists for a longer period of time, it can cause changes in the cells on the cervix which eventually lead to cervical cancer.
References
1 Reference: https://www.cancer.org.au/cancer-information/types-of-cancer/cervical-cancer