dedicated servers for big web sites?

[pranith]

I come to know that for big web sites dedicsted servers are mandatory and every eb hosting service provider is advising us to shift to dedicated server. How does it will be helpful for the big web sites. Please let me know.

[webspider]

Big websites require more space. Usually for big websites these are resource intensive. Thus the necessity for a higher capacity server. Running a dedicated server can address bandwidth and space constraints.