Latest model of iPad

There a two basic variants of each model of iPad:

WiFi Only

WiFi Only models of iPad have, as the name suggests, only WiFi connection with which to access the internet.

WiFi & Cellular

WiFi & Cellular models of iPad, in addition to WiFi connectivity, have an additional “built-in” Cellular radio. If you choose to use the Cellular features, you can add a Cellular SIM and Data Plan to your iPad - and can access the internet when you are away from WiFi network coverage. WiFi & Cellular models of iPad also include GPS positioning capabilities.

iPad - Cellular - Apple

The additional Cellular features make these models more expensive - but much more flexible in their ability to maintain connection to the internet.

With the cellular option you can access the internet even if you don't have wi-fi available. See the information in https://www.apple.com/ipad/cellular/

You get internet when not connected

I want to purchase the best ipad of year 2020 model as new i pad always offer the best technologies.