The LG ThinQ Service app is probably related to the ThinQ app that controls their smarthome devices: https://www.lg.com/us/discover/thinq/app
LG Account, as the name implies, presumably manages access to your LG account (similar to the Samsung Account app): https://us.lgaccount.com/login/sign...emp&show_add_services=Y&show_select_country=N
What phone do you have? I have an LG V60 and a V40 and never use these apps.
I use a LG G8 ThinQ. The apps are not there in the app drawer but I saw them in the update center and was wondering what are they for.