How does one go about doing this on an iPad?
I tend to click - share link - via email - copy the link in the email, cancel all of that, then paste away in a post.
Assuming it is same as iPhone version of app, look at bottom of screen (this only appears in portrait mode, not landscape) & you will see what looks like a "V" with the wide, open part pointing to the right. There are small dots on the ends & point of the V. Tap that & a menu of share options appears for email, twitter, etc., one of which is "copy link". Tap that & go wherever it is you want to paste it.
