How do you activate mods in Minecraft PE?

How do you activate mods in Minecraft PE?
Once you’ve installed the mod, you can open it in a new world by doing the following:

Tap Play.
Tap Create New.
Tap Create New World.
Scroll down to the Resource Packs or Behavior Packs section in the panel to the left.
Select Resource Packs or Behavior Packs.
Select a mod.
Tap Activate below the texture pack.

Once you’ve installed the mod, you can open it in a new world by doing the following:
  1. Tap Play.
  2. Tap Create New.
  3. Tap Create New World.
  4. Scroll down to the Resource Packs or Behavior Packs section in the panel to the left.
  5. Select Resource Packs or Behavior Packs.
  6. Select a mod.
  7. Tap Activate below the texture pack.