Triple Letter score and Double Letter score. https://en.m.wikibooks.org/wiki/Scrabble/Rules https://en.m.wikibooks.org/wiki/Scrabble/Rules A simple search on

Triple Letter score and Double Letter score. https://en.m.wikibooks.org/wiki/Scrabble/Rules https://en.m.wikibooks.org/wiki/Scrabble/Rules A simple search on your search engine of choice would have yielded the answer.