Reverse image search allows users to use an image as their query to find related images, websites, and information across the web. This technology enables various uses such as identifying the original source of an image, finding web pages where similar images appear, getting information about an image, revealing copyright infringements, and more. Users can perform a reverse image search on their iPhone or Android devices using Google's Lens feature, upload their own image from computer or mobile device, or use AI-powered chatbots like ChatGPT or Gemini to analyze images for more information. The process typically involves tapping the image of interest, selecting "Google Lens" to narrow focus, and then scrolling through search results to find relevant information.