my hosting server Hostmonster reporting 134 visitors yesterday but adsense saying 84 impressions. what is truth?
The difference could be for many different reasons. Adsense changes days at midnight US Pacific time (I can't remember what it's called. PST?) while your server may roll over at a different midnight. (GST or even midnight at it's local time.) Also those fewer Adsense visitors may be because of folks using Firefox and an adblocker so adverts don't get displayed to them.
You cant actually find the two traffic analysis software that provide you exactly same data. If you use adsense, then definately you need to trust that they are correct
If the user has javascript disabled, the ads doesn't be displayed but the hosting will count this visit.
In my blog, Sometimes adsense just disappear because of some reasons, it make the different between impression & visitors
If you really want to know the degree of traffic in terms of unique visitors, then use google analytics or statcounter. Both are free. They give accurate stats when compared to your cpanel...