I need to know whats the difference between “Service request Vs incedent VS Ticket” when I create an automate

2- When I create a service request, I cant find it doesnt reflect in “request type” only what I wrote in request type reflect in “incident” and whatever catalog I careated in service request It wont reflct in the ticket status
-I want whatever Ticket send from service request like “mobile request” it reflect in request type.
whatever I wrote in request type it appear in incident (I want to add one thing an only in incident like network issue and all other requests like laptop request in service request_and when anyone submit a ticket from service request like mobile request it appear in “request type”)

