While many cameras have built-in GPS these days, many older cameras do not. And even if your camera does have GPS, you may have forgotten to turn it on before your last shooting adventure. This is where a handy, easy-to-use feature of Lightroom can help.
The secret is to use your smartphone to take a picture at the same location where you're using your DSLR and copy the smartphone image's GPS data for use with your DSLR images. See the video above for specific details.
B&H carries Adobe Photography Plan subscriptions.