What are the benefits of updating the content?

[fdrix]

I am having this website for a long time. I am very serious about updating the site on a regular basis. Mostly I update the content of the site. Can you tell how frequently should I maintain this updating process? Can anyone of you tell why it is necessary to update the site regularly? Is there any advantage of this? Is it really effective? Can anyone throw light on this? What are the pros and cons of the updating process? Is there any negative effect of this updates? Please equip me with such information.