Effective techniques for identifying individuals in photos include reverse image searches and facial recognition tools. Reverse image search engines like Google Images, TinEye, and PimEyes allow you to upload a photo and find matching or similar images online. This can help identify the person depicted if the image has been shared publicly. Facial recognition technology, such as that used by PimEyes, can also analyze a photo to detect and name the individuals shown, by comparing the faces to a database of identified individuals. These tools can be useful for finding photos of a specific person or verifying the identity of someone in an image, though it's important to be mindful of privacy concerns when using such technology.