Meaning

It shows what your abilities are - but which, due to misuse or overuse may become a Challenge in your life or some irritating personal  habit.
It can be either a constructive or a disapproving aspect of your nature, depending on how you deal with this aspect.
It's a natural talent if recognized & cultivated.
To others it may be an annoying tendency if you do misuse this talent of yours.

[More Analysis]

Click on the calculator to find out your Habit Number

How to Calculate ...

Very simple. Count the letters in your entire name and reduce to a single digit.
For example: Alexander Graham Bell had 19 letters in his name - so his Habit Challenge was 1 (19 => 1+9 => 10 => 1)