Google is testing showing like and dislike thumbs up and down buttons in the hotel search results specifically on photos. You can like or dislike a photo within a specific hotel search result.
This was spotted by Sergey Alakov and posted on Twitter - here is his screen shot:
I do believe this is new and I am not sure exactly what Google would do with these likes and dislikes on photos. Maybe a hotel result with many photos can be ranked by the most liked photos first?
Forum discussion at Twitter.
Note: This story was pre-written and scheduled to be posted now, I am currently offline for a holiday.
