Not sure what you are looking at or what numbers are shown but it could either be finger numbers (1 index, 2 middle, 3 ring, 4 pinkie) or it could be scale degrees (numberd 1-8 for the Major scale; or 1-7 with the octave either being 1 or 8)

For scale degrees of the Major scale. Take C Major as an example:
C - D - E - F - G - A - B- C
1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 or 1