The significant difference between a UK Standard Visitor Visa and other UK visit visas is listed below:

Visa Type

Purpose

Stay Duration

Standard Visitor Visa

Tourism, Family/Friends visit, business, short courses, medical purposes

Up to 6 months

Marriage Visitor Visa

Get married or register civil partnership

Up to 6 months

Permitted Paid Engagement Visa

Short-term paid work for artists, speakers, experts etc.

Up to 1 month

Transit Visa

Passing through UK to another country

Up to 48 hours

Short-term Study Visa

Short courses or English study

6 to 11 months