You can customize the default messages and content that appear when supporters share your campaign on social media. To make changes to this content, navigate to the campaign you'd like to edit, click on Campaign Settings, then scroll down to the Social Media Settings section.
Here, you'll be able to customize the tweet for Twitter as well as the thumbnail, title, and description that appears for Facebook, LinkedIn, Pinterest, and Google+. Note: You'll need to make sure that your title does not contain any special characters.
Hit Save when you're done making changes.
Here's what these settings for Twitter will look like when a supporter shares this campaign using the social share buttons:
From here, they can customize the tweet with their own personal message: