If you use an url like:
https://www.binance.com/api/v3/klines?limit=5&symbol=LUNABTC&interval=5m

Yout get json information like this

These are crypto currency open/close prices, high/low, trades and others.

Below you find the meaning of the numbers

Open time
Open
High
Low
Close
Volume
Close time
Quote asset volume
Number of trades
Taker buy base asset volume
Taker buy quote asset volume
Ignore