Have you seen how Ahmadiyya is wearing? So that is our attitude. Had it been encouraged by Hazrat Musleh Maud A.S. or Khulafa, you would have seen people wearing three taweez everywhere. So their practice tells us that it is not encouraged. They’re called charms.
In English, taweez is generally called charm and the idea behind it is that the charm charms away the bad spirits. You can charm in and charm away. So this charm all charms away the ugly and bad spirits and for that you have a better way of doing, say, La hawla wa la quwwata or Auzubillah minash shaitanir rajim. So whatever of the bad spirits are after you, they would abandon you. So why to wear a charm for that?