send data on webserver using arduino uno and sim800h

Hi!

I use an arduino uno and a gsm sim800h.
First I tryed to communicate with the gsm (calling and sending sms) it's working.

Now I need to send data (calculated from sensors answer) on a web server.

I searched a lot any method, I tried sketchs I found online but I don't understand the global way to send my data (code, AT commands, server...)

If someone can explain the good way to me it will be useful.

Thanks!!