Companies launch various offers to increase product sales. Some common offers are 3 pe 1 free, more amount for same price, discount coupons for next purchase etc etc. The offers mostly depend on the product categories.

But do really these offers increase product sales?
Does your buying decision hangs on the offer or the brand of the product?
Do you buy more than necessary (stock up) if you come across some offer?
Do you defer your buying and waiti for offers?

Lets discuss on the basis of individual preferences.

Well upto an extent YES! I have seen people coming to malls to roam around and end up buying stuffs just by seeing an exciting offer. Again people, I feel, surely know about the offers. You can't fool them, if it is a good deal then only people go for offers.