To perform a Google Image Search from your camera roll, you can follow these steps:
1. Open a web browser on your smartphone or computer and navigate to Google's website.
2. Tap on the "Images" link at the top of the search bar to access Google Image Search.
3. On your smartphone, locate the image you want to search for in your camera roll or gallery app.
4. Tap and hold the image until a menu appears with several options. Select "Copy" or "Share" depending on the available choices.
5. Return to the browser and tap on the search bar at the top of the page.
6. Tap and hold in the search bar until a context menu appears. Select "Paste" to insert the image you have copied or shared.
7. Google will automatically process the image, and you will see search results related to the image you provided.
It's important to note that Google uses various algorithms to analyze the image and provide relevant results. This technique can be useful for finding similar images, identifying objects, or locating the source of an image available in your camera roll.