This question asks someone their opinion about a topic.
Here are some examples:
“What do you think about having a cup of tea with me?”
“What do you think about working overtime next week?”
“What do you think about waiting in line for tickets?”
“What do you think about sailing?”
“What do you think about staying here another night?”
“What do you think about retiring from your job?”
“What do you think about planting new trees in the backyard?”
“What do you think about offering to babysit?”
“What do you think about living in a new city?”
“What do you think about filming our vacation?“