Ride bump stops cushion suspension at full compression, protecting the rest of your suspension components from harsh metal-to-metal impacts on big hits. Bump stops cushion the last bit of suspension up-travel: without one, a hard hit sends the axle or control arm straight into metal-on-metal contact with the frame. AccuTune bump stops are positioned and rated to improve the rate of that impact instead of just delaying it, which matters most on a lifted vehicle with more travel to work with before the factory bump stop would have engaged.
Getting bump stop height and rate right is also part of how a shock is valved in the first place: a shock tuned around the wrong bump stop location either bottoms out harshly or never uses its full travel, so this is one of the details Ride accounts for rather than leaving to a generic factory setting. These are built in-house alongside the rest of the Ride Shocks lineup, sized to pair correctly with Ride Shocks' own shock and coilover kits.