If you share reviews to any websites you can add those links (like Goodreads, YouTube, websites, blogs, etc.) in you Profile, under "Where I Share Reviews".
You can also connect your social accounts in your Profile for easy sharing of your reviews. In the "About You" section of your Profile, just scroll down to connect!*
NetGalley is working on adding other relevant connections, but in the meantime please add links to those accounts by clicking Add a Website (as seen in the screenshot below).
You will also be prompted to connect your accounts on your Dashboard and when submitting Feedback.
*Please note that your social profiles must be public if you plan to share your review links with publishers!