The best analogy is to think of shared hosting as renting an apartment. Multiple tenants share the same building and resources like plumbing, electrical, stairs, elevators, and hallways with an apartment. With shared web hosting, you are sharing resources with other customers on one dedicated server. Like the noisy neighbor in an apartment complex, one bad web hosting customer can affect other web hosting customers with shared hosting. Like an apartment, purchasing shared hosting is much cheaper than dedicated hosting. If you're starting out, I recommend going with shared web hosting. It's going to be a little cramped, but you'll save money. As your blog grows, you can always upgrade to bigger and more dedicated resources. You can find out more by reading my shared web hosting article.