Pour water in the bottom of your Instant Pot (1 cup in the 6 qt Instant Pot and 1.5 cups in the 8 qt Instant Pot).
Place the metal trivet in the bottom of the Instant Pot. Lay the salmon fillets on the trivet (don't overlap them!), skin side down. Season with salt and pepper.
For FRESH salmon: Seal your Instant Pot and set the manual high pressure setting for 3 minutes.
When the salmon is done, carefully release the pressure.
Top with any desired sauces or lemon slices and serve! If you're not a fan of the skin, the skin can easily be peeled off after steaming. Enjoy!
*Note on the salmon: depending on the size and thickness of individual salmon fillets used (or if you prefer your salmon well done), a small amount of additional time may be needed. In this case, as soon as the pressure has released and it's safe to do so, open the Instant Pot and check your salmon. If your salmon needs more time, close and seal your Instant Pot again and set the timer for 0-1 minutes. It will cook further as it comes to pressure again (faster this time since the Instant Pot is already very hot), and then can be cooked under high pressure an additional minute if needed.