Ha,
Day to day I find people trying to stuff keywords in content in order to get better ranking. But remember according to me this is the greatest mistake any one can make. B’cos unfortunately people forget that after all we struggle to get ranking in order to get more customer. But keyword stuffing would lead to increase in bounce rate of your site.
Further this activities may lead to spamming which would spoil your sites trust rank like anything.
Keywords shall be used smartly in such a manner that it seems to be natural and user friendly.Let me make this clear through this example:
Say if there are two sites “A” & “B” who sell smart phones with all ranking factors common but if site “A’s” content is like “Well-come to smart phone store where we sell smart phones at cheap rate.We have a wide range of smart phones with assured gift….etc.”
where as site “B’s” content is “smart phone store welcomes you.smart phone store has wide range of smart phone.We are smart phones master…..etc.”
In this case as a customer I would prefer Site “A” rather than site “B” as I find site “A” more genuine than site “B”.
I would recommend you to listen more from eXpert Shree Matt Cutts