As with every aspect of the PhD and the viva, there is a variety of experiences for the end, but several common stories.
Candidates might be asked if they have any questions or comments. Then when all the talking is done, examiners most commonly ask the candidate to leave the room so that they can have a quick chat. While the candidate waits nearby, perhaps nervously, perhaps not, the examiners confer and make a firm decision. They check they’ve got satisfactory answers to all of the things they needed to raise, and talk about the viva and what they think of it all.
The length of the wait varies. One person told me they waited two minutes and were called back; another told me they waited half an hour, and while there were no problems they had really started to worry! Ten to twenty minutes is seen as a reasonable length of time for examiners to chat.
Typically, examiners give the result then. They tell the candidate what the outcome is and what that means. If corrections are involved they might say a little about them. Examiners might need time to put a full list together. While minor corrections is the most likely outcome, it’s important to know in advance what all the outcomes mean. How much time is given? What is the process for getting examiners to certify that corrections have been completed?
The viva is not the end of the PhD. The end of the viva is not the end of the PhD. It can seem like there’s always something to do. But you’re getting close. Compared to everything that’s come before, you’ve not got far to go.