I ask your understanding because this original post was written in Korean.
In this tutorial, the author told various stories about IoT and big data.
And he explained about PubNub which is a kind of IoT-cloud-server and provider of a cloud service for streaming data in real time.
In last section, he demonstrate how to connect/operate PubNub with Arduino, sensors and WizFi250.
Here are parts as below.
And, you can connect WizFi250(DFRobot Shield) and sensor as below.
Now, you can see the value of sensor in your channel page in PubNub.
In addition, you can see it your web browser in real time as below.