String is a Legendary natural-type fruit in Blox Fruits. It is expensive and hard to obtain String fruit. It costs $1,200,000 or 1650 Robux and has a 5% chance of being in stock, so it will take some time to show up in a shop. It has a spawning chance of 6%, so there is a low chance that you will find it while playing.
The string is a decent fruit, but when you compare it to other fruits that are legendary, you will notice that it does not perform that great. It has high damage and great stuns, which makes it great for PVP and grinding, but only if it is awakened. Do you like it, are comfortable with the style, and combos are some of the factors that you will take into consideration if you want to use this fruit.
What combo you will use depends on your in-game situation, who you are fighting with, and what you want to achieve. It is best to spend some time testing all possible combos, and by doing that, you will learn how to use what works best for you and also how to counter it. So go and test String in a game.