help in pva my accounts using plivo.com

hi there

i just have made account for plivo.com and purchasing numbers to pva my accounts

but to recive the sms its requied me to
Set up a Web Serve

i have no idea how to do it !!

here is the page

https://www.plivo.com/docs/getting-s...eceive-an-sms/

can anyone help me ?