From the Google home page, click Images from the top menu.
Enter a word to search, and then click the magnifying glass to begin the search. To search by image, click the camera icon in the search box, and then insert an image by either dragging or pasting it in or uploading it by clicking Upload an Image. Click Search by Image when Finished.
Right-click an image, and then select Copy Image URL. Click the camera icon, and then click Paste image URL.