Very low prices probably mean the host is cramming more customers onto each server, for instance. Performance will be poor as there aren't enough resources to go around the extra load could mean more server problems and downtime. Dedicated hosting implies that you also get far more control over how the server is configured. You can add and remove software, install updates or tweak all settings, allowing you to optimize the server for your specific needs.
Best of all, dedicated hosting contracts often come with fast and knowledgeable support. The best providers will even monitor your server for issues, like failed services, and can often fix them before you've realized there was a problem.
Some dedicated hosting options also provide additional features like control panels, applications, security software, malware scanning, malware removal, SSL certificates, and OS installation.
Features of dedicated hosting providers are:-
Customization
Uptime
Congestion
Security
Customer Support