If you own a large business or dozens of successful websites, then you may want to consider upgrading to a dedicated hosting plan eventually. This is especially true if you are experiencing site down time or other performance issues with your current hosting plans.
If you are just getting involved in web hosting, using a dedicated hosting plan as your first web hosting experience is not recommended. Instead, you may want to start with a shared or VPS hosting plan, both of which are suitable solutions for small to medium sized businesses.