Traffic variation

One day I receive 20 organics visits and the day after the same website receive 1...

Example:
Day 1 : 20
Day 2 : 1
Day 3 : 8
Day 4 : 31
Day 5 : 25
Day 6 : 2
Day 7 : 16

Any ideas?

 

Depends on the search volume for that particular keyword
That's only if your website ranking is stale within major search engines.

 

was this dec 31 or jan 1? traffic dropped dramatically for me during this period...

 

In general. Nothing specific.

 

All of those numbers are much too small, and for much too brief a period of time, to establish any trends from them.

 

Here's the real numbers

1- 6
2- 8
3- 7
4- 5
5- 1
6- 6
7- 8
8- 1
9- 10
10 -8
11 - 1
12 -4
....