Fire up your Traeger by turning it to the smoke setting to get a fire established, leaving the ild open. This usually takes about 5 minutes. You'll see some smoke after a few minutes and then you won't see smoke anymore but the temp will stay steady(ish).
Once the fire is established, turn the grill up to 350, close the lid, and let it preheat.
While your grill is heating, take your salmon filet and place it on a sheet of non-stick foil, skin down. Drizzle olive oil over it, and follow up with the salt, dill, and lemon. Just a squeeze over the top will do!
Once the grill is preheated, place the foil with the salmon on it onto your grill grates, shut the lid, and let cook for 15-20 minutes. Depending on how thick your filet is, you may need a little more time. Make sure the fish is flaky, but also that you don't overcook it.
Remove from the grill when done, let sit 5 minutes, and serve!