Classic tween refers to tweening in Flash CS3 and earlier, and is maintained in Animate primarily for transition purposes.
These tweens are similar to the newer motion tweens, but are more complicated to create and less flexible. To create a classic tween, set a keyframe for the start point and a keyframe for the end point.
Motion tweens are used to create animation movements within Animate. Motion tween animation is created by specifying different values for an object property between the first and the last frames. The object properties vary from position, size, color, effects, filters, and rotation.
When you create a motion tween, you select any frame in the tween and move the motion symbol on that frame. Unlike Classic and Shape tweens, Animate automatically builds a motion path animating the frames between the first frame and the next keyframe. Since you do not use assets in each frame, motion tween minimizes the file size and reduces assets in your documents.
Adobe Animate can tween the position, size, rotation, and skew symbol instances, groups, and text. It can also tween the color of instances and text to create animated color shifts or fade in or out of transparency.
Use classic tweens to tween the changes in properties of symbol instances, groups, and text. Before tweening the color of groups or text, convert the objects into symbols.