When it asks you for a five letter word and you type it in some times a letter will be gray, white, or really bright white. When the letter is gray, that means the letter is not in the word. When it's white, it means that it is in the word but not in that position. But when it's really bright white it means the letter is in the right place. The goal of the game is to guess the correct word in less than 6 tryes.
You can play the original Wordle here: https://www.nytimes.com/games/wordle/index.html
