Where is phosphorus used?

If we talk, for example, about red phosphorus, then it is used to make matches, for example. It is worth knowing that phosphorus was discovered only in the second half of the seventeenth century, namely in 1669. It is also an interesting fact that it can even be found in sea water. It is a non-metal, its chemical activity is quite high. Also, one cannot but say that phosphorus is contained in various seafood.