When learning to play the piano there are going to be many music theory lessons along the way. Here are two quick theory lessons.
The first lesson is: Staccato – when you see the dot above or below the note, you will play the note short and detached. If the dot is beside the note that is not a staccato note.
The second lesson is: 2nd and 3rd Intervals. An interval is the difference between two pitches.
Click on the picture below to learn about these music theory lessons.