E-mail accounts are still the #1 tool for communication on the internet. While we take greater measures to safeguard our E-mail address more than we did back in the 90's, we still need to list our main public contact information. If we neglected this we may very well lose business, fail to connect, or miss out on an available opportunity.
Many folks are using "email@example.com" or "firstname.lastname@example.org" as their main contact information. Although these E-mail addresses work, they do not convey the true name of your web identity. Example: Say your name is Harold and own widgets.com. As president, you would make your E-mail account Harold@widgets.com. You would direct all specific business E-mails intended for you to this E-mail address, and create a separate account for all sales related topics, ie email@example.com. These are just two simple examples. An account may be created for each department.
Forwarders are wonderful, and they are distinctly different from email accounts. They look just like an E-mail account, but on the backend, they really just forward the messages to another E-mail account. The difference is simple: one stores actual messages, where you can send and receive (To: or From:) them. The forwarder - sometimes called an alias - only does the job of connecting the prefix to the account.
Any and all of these E-mail/forwarder combinations can be set up and configured based on your individual or company needs. Most hosting companies and services (such as the one I provide) have few restrictions or limitations, which means you can have just about any number of accounts before any red flags get waved.