What Tantra is not
The word Tantra in Western popular culture has become almost entirely associated with extended sexual experiences, exotic techniques, and a vague promise of transcendence through pleasure. That association is not entirely wrong — but it is almost entirely incomplete.
Most of what is marketed as "Tantric" in the West has little relationship to the actual philosophical and contemplative traditions the word comes from. That does not make it harmful — but it does mean the word carries a great deal of noise.