A Visitor Visa allows the person to visit the United Kingdom for six months or on multiple occasions.
It is granted for the purpose to visit family and friends in the UK or for tourism purposes.
It cannot be switched over within the country, but in exceptional circumstances, you can.
Being a visitor you cannot able to work or study unless it is allowed by the permitted by the as stated under the Immigration Rules. To be granted a visitor visa you must satisfy and meet the Immigration Rules for the visitor visa.
There are various types of visitor visas:
a) Family Visitor Visa
b) Child Visitor Visa
c) Student Visitor Visa
d) Sportsperson Visitor Visa
e) Business Visitor Visa
f) Visitor in Transit
g) Visitor for PLAB Test
h) Entertainer Visitor Visa
i) Visitor for Private Medical Treatment