For what purpose are keyframes used in Premiere Pro?

Keyframes in Premiere Pro are essential for defining specific values for animations or effects at designated times during a clip. They serve as markers that indicate where changes occur, allowing users to animate properties such as position, scale, opacity, and various effects over time. By placing keyframes at different points on the timeline, you can create smooth transitions and dynamic changes, which enhance the visual storytelling in your video projects.

For example, if you want to gradually increase the scale of a video clip from 100% to 150% over five seconds, you would set keyframes at the beginning and end points of that duration. The software will then compute the in-between values automatically, producing a smooth zoom effect. This capability makes keyframes incredibly powerful for creating custom animations and controlling the flow of various attributes in a project.