DICE have announced the dates for the Mirror’s Edge Catalyst Closed Beta. The Beta test starts on April 22nd and will last for five days, ending on April 26th. All players that have been selected for the test will receive their codes via e-mail on April 22nd and April 23rd. As the official news say, Beta participants will be able to try out several of the main missions in Faith’s story, Side Missions, other optional content, and the Social Play features Mirror’s Edge Catalyst has to offer.
Here is a developer video to explain what Social Play is:
Mirror's Edge Catalyst Developer Diary - Social Play