Different methods and their arguments are used to achieve the wished behaviour of your telegram bot, which you created by now (hopefully).
The basic structure of a query is (as mentioned in "Create a bot with the BotFather"):
https://api.telegram.org/bot*BOTTOKEN*/*METHOD*?*ARGUMENT1*=*VALUE1*&*ARGUMENT2*=*VALUE2*
You will use this structure with as many arguments you need/ want and this documentation will show you the basic methods and how to use them.