Not every year. Not every month. Not every day. Not even every hour. The website gets updated—in all of its myriad updatable places—every nanosecond. The updating is dynamic and consistent.
Where would this super-uptight process even be needed? Stock quotes. Mainly, the kind on which professionals rely and expect all of the data to be current and implicit and accurate.
Think: Die, Namic, if your name was Namic and you didn't update properly, such that investors lost money on your data feeds. Yeah. Could happen.