The experience system has 100 levels. If you have reached 100: Welcome to the top!
Of course, you continue collecting experience points in the background.
In most Palace games, you will now see the experience bar at the end of a table or in your profile displaying your growing number of experience points on level 100.
In Pinochle, Whist, and Gin Rummy, you do not see the growing number of experience points, but instead, a celebrative "MAX." to recognize that you reached the maximum level. At the end of a table, you will still see how many experience points you gained there.