The throwable weapon type is perhaps the most consistently misused in the game. While they can do immediate damage, especially the Frag Grenade and Molotov Cocktail, they're best used as a denial weapon. By laying down fire and tossing these weapons into an area, you're denying this area to your adversary, allowing for greater control of their movement and their basic abilities. For instance, the Smoke Grenade can help obscure your movements, and the Stun Grenade can help to remove sight and sound from your adversary, at least temporarily.
Note: Since Bluehole doesn't release the official weapon values of guns, no website has 100% accurate statistics for weapons. Each website relies on hundreds of spreadsheets and each website has different numbers. Most websites recorded their data via private matches and some don't include the feet/range. No one knows if the tests were consistent when recording the data. In short, no one has the exact numbers, but this data is close to the real values.