Introduction Cancer screening plays a vital role in early detection, improving the chances of successful treatment and survival. Different cancers have specific screening tests recommended based on evidence about who benefits most and when to start screening. Understanding these guidelines helps individuals and healthcare providers make informed decisions about timely screening and preventive care. This article provides an overview of cancer screening guidelines for some of the most common cancers: breast, colorectal, lung, cervical, and prostate. It explains who should be screened, how often, and the benefits and limitations of these screenings. Why Cancer Screening Matters General Principles of Cancer…