There are three buttons under each photo. Click one of them to post a link to the photo on a chosen social platform.
You can also share links to your newly posted photos to twitter, autmatically. For that you need to toggle Share on Twitter or Share on Facebook either on the upload page or on your account settings page.
Keep in mind, you'll have to authorize tookapic to post to Twitter on your behalf. We will only post links to your recently posted photo once you publish it on tookapic.