Google+ has recently released a new “Thank” feature, this feature literally does as the name say through Google+. For example if you are searching for a service on Google and you find a friend who is in your circle who has +1 one of the listings then you have the ability to thank them for helping you find this information. This only appears when you are logged into Google+ and when you press the “thank” button it directs you to Google+ and the message you receive contains the original +1 on the post. This thank you is the shown on the wall of the person that you have thanked and if you are looking to keep this thank you message private then ensure that you do not add any other circles to the message.
Some people have found however that the message saying thank you has appeared on their friends wall but not the link of the information you have found via their +1. However it seems that this feature is still in development so these problems may appear at times and there may be more official announcements about this feature in the future. Google have made the following statement about the feature and it’s uses.
“Just like you would thank a friend in person for giving you a helpful recommendation, now if a friend’s +1 helped you find what you were looking for while searching on Google, you can immediately thank him or her by clicking the “Thanks” link right in your search results and writing a quick message. When your friend signs in to Google+, your thanks will appear in his or her stream. We’re continuing to try out new ways you can interact with the people you care about right on the results page.”