In one sentence, describe what the following article is about:

It is important to keep a careful tally of each player’s scores as you play. Each player should announce his or her score after adding it up and then the score keeper should write it down right away. Premium Squares will alter your word scores, so pay attention to these when you play words. You can only use the bonus from a Premium Square if you laid the tile over that square during the current turn. You cannot incorporate bonuses from Premium Squares that you already counted in a different turn or that were counted by a different player. When adding the bonuses for plays with multiple Premium Squares, add the letter bonuses in before the word bonuses. For example, if you spell a word that has a double letter bonus and a triple word bonus, add the double letter bonus to your total before multiplying the total by three. A bingo is when you use all seven of your tiles to play a word. When this happens, you should add up the total value of your word plus any bonuses gained from Premium Squares and then add 50 points. After all of the players have exhausted their tiles or cannot play any more words, add up each player’s points total. As the score keeper adds the totals, each player should let him or her know the points value (if any) of the tiles he or she has left over. Deduct this value from each player’s points total to determine each player’s final score. After the score keeper has added each player’s scores and deducted the values of any unused tiles, he or she may announce the winner. The person who has the highest score wins the game.  Second place goes to the person with the second-highest score, and so on.

Summary:
Keep score as you go. Watch for Premium Score squares. Get 50 points added to your word score if you get a bingo, also known as a bonus. Add up each player’s scores at the end of the game. Announce the winner.