Standard support structure revolves around a three-layered system-Tier 1 technical support or Level 1 support, followed by Tier 2 and Tier 3 technical support.
IT support, also known as a technical help desk or support desk, is a service businesses offer for IT product customers. You can choose a Level 1 Support engineer for your technology-related issues. However, if they cannot identify and fix the problem, the ticket is assigned to L2 and L3. So, in that case, you need to contact L2/L3 customer support engineers according to your requirements and resources.
To know more visit: https://www.ecosmob.com/overview-of-tier1-tier2-tier3-it-support-engineers/
