ChatGPT has introduced a significant update to its Deep Research feature, allowing users to specify which websites to include in their research. To activate Deep Research, users can click the “+” button under the prompt box or use the new button in the left panel. Once activated, a “Sites” dropdown appears, enabling users to either search the entire web or limit their search to selected websites. There's also a toggle option to prioritize the specified sites while still allowing a broader search. This update aims to enhance user control and improve the efficiency of research tasks. The potential applications for this feature are broad. Marketing teams and professionals can now tailor their research to reliable sources, which is particularly valuable in fields like health and wellness, where misinformation is rampant. Users have expressed excitement about the ability to filter for credible content, enhancing the quality of insights gained from Deep Research. Comments reflect a strong interest in using this tool for competitive intelligence and specialized research, with many looking forward to experimenting with the new capabilities. While the update has not been personally tested by the author, the anticipation for this feature has been building for about a year. The feedback from other users indicates a strong demand for this level of specificity in research, with many already relying on Deep Research for various tasks. Overall, this update appears to be a game changer for users who depend on accurate and relevant information for their work.