The trial started today for the weekly reset on each platform (PC, PS4, and XBOX1).
On the campaign side, you'll be able to play all story content for the first two planets: Earth's European Dead Zone and Saturn's moon, Titan. You'll also be able to visit Destiny 2's new social space, The Farm. This includes campaign missions and Adventures located in both locations. The demo also grants Crucible access, but only to the Quickplay playlist. Demo players can join a Clan, earn Clan XP, and join up with other players for cooperative action. You will be limited to reaching level 7 only, so you won't be doing any Raiding or touching the Nightfall.