Standard visitor Visa:
You can get a standard Visa to enter the UK for vacations and meet up with family and friends, attending a business activity (Meeting), enroll in a short course of study, academic exchange program, and research activities, receive private medical treatment. For this, you don’t have to apply for Visa. This basically depends on your nationality and plans. Your stay in the UK duration is up to 6 months only but you can stay in the UK for a longer time up to 11 months on medical grounds.
If you can often visit the UK for a long-term standard visitor visa that endures 2 years, 5 years, or 10 years but each visit stay duration is 6 months. Online application will be entertained and book the appointment for biometric verification. Visa will be applied 3 months before your travel to the UK and a decision will be made within 3 months. You cannot switch your visitor visa to another type of visa.