What are some example keywords? I have never searched for landmarks, I only search for location.

How many landmarks are there to justify sending your data off? Can't the database be stored on the device?

cat, pizza, dog, red car, Tokyo, dolphins, garden

The usual context is "oh I saw some dolphins forever ago. let me see if I can find the photos..."

All of these worked in the past without sending any data off the device.

But now you suddenly need the cloud to have it recognize the Eiffel tower.

One time in Paris I received a crème brûlée that strongly resembled the face of Jesus Christ, so naturally I took a picture before devouring it.

Last night I was able to find the image using the single word "creme". Definitely saved the story.