How to use vwap to determine for option trading

I am learning options trading and I found that vwap is important tool but I dont know how to use / interpret it.
For example option expiring on 28th July 2018 11000 CE vwap is 20.69 and premium price is 18.65 .

so premium (LTP) is less than vwap but what does that mean ? does it mean its a good price to buy or sell ?