Hello
How to connect node mcu with wifi via blynk app?
@Shivam_Thakur Please don’t tack general questions onto others topics, particularly old ones. I have moved your question into it’s own topic.
And as for the answer… you do some research and try 
https://examples.blynk.cc/?board=NodeMCU&shield=ESP8266%20WiFi&example=GettingStarted%2FBlynkBlink