The way you count using Fibonacci.You add the biggest number to the one next to it in the sequence. The sequence starts with 1 so 1+0=1 ,1+1=2,1+2=3,2+3=5, 3+5=8 so you end up counting like this 1,1,2,3,5,8,13,21,34,and so on. That's how you count Fibonacci.
Fibonacci is used for a variety of things. Its fun and a different way of counting. You can use it to count petals on a flower or seeds.
Many times Fibonacci is used in pyramids like this:
1
2 1 2
3 2 1 2 3
5 3 2 1 2 3 5
8 5 3 2 1 2 3 5 8
13 8 5 3 2 1 2 3 5 8 13
The pyramid starts in the middle and goes out to the left and the right.