Capture points are large, green constructs and represent one of the objectives needed when playing a Capture game. Each of these points need to be charged to 100% in order to be completed or “captured.” You can see how far a point has been captured either by monitoring the percentage level on the top of the post itself, or by checking your UI.
Runners who stand in close proximity to these points add to its charge, with the speed of this depending on how many players are present. However, stepping within range of these points will cause you to be revealed to the Hunter. Should you be chased off a point, progress will count back down to either 50%, or 0%.
Capturing 2 out of 3 points will complete the match objective and open the Garden's Exits.