Help me understand Paragon? What's next after reaching 70?

[Maskraider-3992]

I had replied eariler on your other thread:

@Maskraider-3992

3. Kanai’s cube is a very power tool. The game guide has a bried introduction, but I suggest you to watch videos for how to get and how to use the cube. Just search 「Kanai」 on YouTube. Find a more recent one to watch.
   I suggest to get the cube before lv 60, so that you can use it at 61+, when Death’s Breath starts dropping. (If you run some Channel Rifts, you may DB from the reward before 60 and you should get the cube earlier.)
4. After 70, EXP turns into Paragon levels (points). You can assign and reassign points to some properties at any time. Many properties are capped at 50. Usually, movement speed, critical chance, critical damage, cooldown have high priority, but may vary depends on your build.

Which parts you want to further explain?
For Kanai’s cube, you may watch this video:

Kanai Cube & Augment Guide Diablo 3 Patch 2.6.4 Season 16 Walkthrough