UK ETA for short stay refers to the Electronic Travel Authorisation required for eligible visitors travelling to the United Kingdom for temporary purposes. It is designed for short visits such as tourism, business meetings, family visits, and transit. The ETA allows stays of usually up to six months per visit, depending on the immigration rules and purpose of travel. It must be obtained before departure and is electronically linked to the traveller’s passport. The authorization can be used for multiple entries during its validity period, typically up to two years or until the passport expires. However, it does not guarantee entry, as final decision rests with border authorities.