t depends on how much data is currently being exported from POP, and what load it is on gu.se. It may take up to the next day, but usually it goes much faster.
Remember to click "Save Person" after making updates in POP. If the new information is not visible on gu.se the next day, contact your POP administrator.
Your browser's cache can make updates non visible
One reason that updates are not visible on gu.se can be that the browser uses its cache when displaying the page. If so, the latest updates are not visible. To work around this, you can try to clear your browser's cache, and then update your page on gu.se. Clearing the cache is done in different ways in different browsers, if you don't find the function, you can do an online search for instructions.