The letter S is the 19th letter in the English alphabet and is based on the Phoenician letter Shin, which is depicted as a W. The letter was adapted by the Ancient Greeks and became the letter Sigma. Originally the sound was based on the sh sound but the Greeks had no need for this sound, which is when the letter Sigma was created and the S sound was developed.
The letter S has just one look to it, whether it is in the upper case or the lower case for. It is a simple letter and something that is one of the easiest to learn. The letter is also one of the easiest to use, as it can usually be added to the end of words to create the plural form. This is something worth looking into when it comes to using the letter in a game of scrabble.
However, up until the 15th century, there was another denotation for the long S, which was a letter that looked similar to an r. This was also commonly used for the lower case S and the symbol that we know for the letter was just for the upper case version. This changed when printing became popular because the staff-like r symbol was difficult to do.
The German language commonly has an “ss” in some words but this is commonly denoted as a strange B symbol. This often gives the words a Z sound.
In the English language, the S is the third most commonly used consonant and the seventh most common letter in the whole alphabet. This leads to the four S’s in a game of scrabble only yielding one point each. This means that it is not usually worth putting the letter on a bonus tile unless you have no other options.