New to the forum - "simple" question?

Hi,

I am new to this forum and I have a “simple” question about Flight ware. When I go to the flight tracking page and select the airport to see the air traffic, I see that there are (3) lines of information for each flight. The first line indicates the airline and type of plane, the third shows “from - to (destination)”, but what exactly does the second line (number) show? Are these altitude? Sorry for the simplistic question.

Thank you,

Tom

Altitude (ex, 360 is 36,000’), and speed in kts.

Thank you!!

Tom

And before we get into another thread about mach 1 airliners the speed is one of two things. The filed True Airspeed is shown on the page for a particular flight. The ground speed is shown on the map as in your question.
Both are in Nautical Miles per hour (Knots).