At some point yesterday, I was in the chrome browser (which is basically my OS these days) and I hit Edit, Copy URL, and I realized that I must do that dozens of times a day. Grabbing links and sharing links is possibly the most common thing I do from day to day.
And now with the latest build of Android, when you hold your finger over the address bar in the android browser, you are given the option to Copy URL. Since discovering this feature recently, I do it on my phone dozens of times a day as well.
Android also has the "share page" feature which will let you send the URL of the page you are on into any app on your phone that can take a URL (Twitter, Facebook, Tumblr, Kik, gmail, text, etc, etc, etc, etc, etc, etc).
This isn't an advertisement for Chrome and Android. I'm sure most modern browsers offer this feature. And I suspect that iOS supports this feature too (although I don't believe it offers the "share page" feature that android has).
This is just a recognition that URLs/links are the lingua franca of the web and every app, web or mobile, should make capturing them and working with them as drop dead simple as possible. I certainly appreciate this feature and I suspect all of you do as well.