There are a few different ways to search Google using a picture on your iPhone.
One way is to use the Google app. If you have the Google app installed on your iPhone, you can use it to search for images. Just open the app and tap on the image icon in the top right corner. Then, tap on the camera icon to select an image from your camera roll or take a new photo. Google will then show you any similar images it has found.
Another way to search Google using a picture is to use the Safari web browser. Open Safari and go to google.com. Then, tap on the image icon in the top right corner (it looks like a little camera). From there, you can select an image from your camera roll or take a new photo. Google will then show you any similar images it has found.
You can also search Google using a picture by copying and pasting the image URL into the Google search bar. To do this, find the image you want to search for and tap on it. Then, tap and hold on the image until the options menu pops up. Tap on “Copy Image” to copy the image to your clipboard. Then, open Safari and go to google.com. Tap on the search bar and then tap on the Paste button. Google will then show you any similar images it has found.