ELI5: what is employee experience?

employee-engagement
tips
eli5

#1

what exactly is employee experience? what factors contribute to a good employee experience? How can I as a founder improve the employee experience in my company and keep it consistent for all who are working here and will be joining in future?

Does it need a dedicated person to improve the employee experience in an organization?
How do you ensure a great experience in your company?
Thanks for helping!