Preheat the outdoor grill to medium-high heat (approximately 400°F / 200°C) and lightly oil the grates.
In a medium mixing bowl, combine the diced mango, red bell pepper, red onion, cilantro, minced jalapeño, and lime juice. Set aside at room temperature.
Brush both sides of the salmon fillets with olive oil and season uniformly with salt and black pepper.
Place the salmon on the grill, skin-side down. Close the lid and cook for 5 to 6 minutes without moving the fish.
Carefully flip the fillets and grill for an additional 2 to 4 minutes until the internal temperature reaches 145°F (63°C) and the flesh flakes easily.
Remove the salmon from the grill and rest for 2 minutes before topping with a generous portion of mango salsa.