This document summarizes three key issues that are the focus of congressional oversight of online platforms: anti-competitive behavior, privacy concerns, and content control. For anti-competitive behavior, it discusses consolidation among internet companies and debates around net neutrality regulations. For privacy, it outlines concerns about personal data use and the GDPR and CCPA laws. For content control, it mentions debates around influence of "fake news" and censorship. While congressional hearings have addressed these issues, agreement on policy solutions has not yet been reached.