[Ch4pl1n]

Hi my dear felas,
I did not find a thread that helped me so I create one:

I am currently learning how to use dorks on Google to identify sensitive data (e.g. confidential documents).

I was wondering what is the difference (and the interest of each one) between :
* Using "keyword" rather than allintext: keyword
* Using filetype:pdf and ext:pdf

Also, do u guys know what is the maximal (and optimal) length of a dork on Google?

Thank you very much,
God bless u