A 30-day single entry visa allows you to stay in Dubai for up to 30 days from the date of entry. With this visa, you can enter the UAE only once. If you leave the country before the 30 days are completed, you cannot re-enter using the same visa. This option is suitable for short vacations, visiting relatives, or attending meetings. If you wish to stay longer, you may apply for an extension before the visa expires, subject to approval.