ESP12E communication WIFI

Hey guys,
I’m using the NodeMCU ESP12E. I need to sent and recive data to app, but I don’t understand about WIFI and I don’t know by the way that I start. Can you help me? Thanks

Start here:

https://docs.blynk.cc/#intro-what-do-i-need-to-blynk

it will step you through what you need and get your ESP8266 connected to your wifi