Sharing can be done from the project page itself or after supporting a project. From the project page there is a ‘share project’ button with links to facebook, twitter, linkedin, google plus, pinterest, and code to embed the project in another website as shown below.
After completing a gift the user receives a receipt that includes links to facebook and twitter to share with others. These links automatically include details of the project they supported with hashtags to your project will be trending on the social networks. See an example receipt below.