Foreign nationals who wish to work in the UK must first obtain a valid visa. The process of obtaining a work visa can be complicated, so it is important to understand the requirements and how to apply.

The Skilled Worker visa replaced the Tier 2 General Visa and is a sponsored UK work visa for skilled workers. Migrants workers usually have this type of visa because they work within an eligible skilled job. The sponsor (UK employer) for the Skilled Worker visa will require a approved sponsorship licence from the Home Office before they can recruit overseas migrants. This category leads to settlement in the UK and to be naturalised as a British citizen.

Original Source: https://www.quora.com/What-is-a-tier-two-skilled-worker-visa-for-the-UK/answer/My-Legal-Services-1