Hi Vinay,

Greetings to you!

Salesforce Live Agent is a native Salesforce tool that provides the ability to communicate in real-time with your website users. Using Live agent, Service representatives can directly chat with customers and resolve the customer issue. 

Omni-Channel offering from Service cloud is a promising product and it can automatically route records to agents in the queue on basis of incoming case complexity and workload of agents. Omni-Channel uses queue and routing settings to make sure that work goes to an agent who’s a good fit.

Live Agent is powered by Live Agent Configurations, which control the behaviors and settings that are available to Live Agent users. Similarly, Omni-Channel uses Presence Configurations to control the behaviors and settings that are available to Omni-Channel users. You can integrate Live Agent with Omni-Channel so chats are routed just like other work items, and you can even use Omni-Channel routing for your chats. Whichever way you use Omni-Channel with Live Agent, your agents are then able to accept or reject chat requests right from the Omni-Channel widget.

When you integrate Live Agent and Omni-Channel, your Live Agent users also become Omni-Channel users, so your chat agents need to be associated with both a Live Agent Configuration and a Presence Configuration.

Please refer to the below links which might help you further.

https://help.salesforce.com/articleView?id=live_agent_and_omni_compare_routing.htm&type=0

https://help.salesforce.com/articleView?id=live_agent_and_omni_new_customers.htm&type=5

https://sfdcpanther.wordpress.com/2018/03/12/implement-omni-channel-from-scratch-salesforce/


I hope it helps you.

Kindly let me know if it helps you and close your query by marking it as solved so that it can help others in the future.

Thanks and Regards,
Khan Anas