How can I implement something like Play Store Description

Play Store (among so many other websites) shows the description of the item not completely, instead they show part of it, and it hides the rest.

You can click on "Read More" in order to get to read the rest of the description, which (the button) will expand the description part.

The thing is: It show the rest of the text as faded just like you can see here:

http://ift.tt/Idpx2b

Please notice the text "to bump into something you know."