How do you give other players neighborly help?

You can give neighborly help to any player that is discovered on your World Map, or anyone in your Fellowship. In order to give neighborly help to a World Map neighbor, simply select their city and click the "shaking hands" icon at the bottom of your game screen. Some people use their city names to show what kind of help they prefer. To help, select any building that has the "shaking hands" icon flagging that help is available. Once you completed the neighborly help, you will notice any coin, supplies (giving neighborly help within 23 hours), or goods (Ancient Wonders) rewards are automatically added to your account.