I have no smart meter
Traditional kWh meter with revolving wheel
You have an electricity meter with one counter. You only need to supply the figures before the comma. Some meters also give you figures behind the comma, there’s no need to provide these.
Traditional kWh meter with two counters
Some electricity meters give you two readings. Counter I is usual the upper or left one. If only one counter moves please provide this one. If both move please provide the sum of both, and do so again at the next reading.
I do have a smart meter
If you have a smart meter please consult the manual provided or contact your energy supplier for the meaning of the display(s).