Once you have set up a domain and bought the domain name, you now have complete freedom over your chosen domain name. For instance, you can choose to separate functionalities and concerns of the website to handle different portions of your project as you see fit. The use of subdomains is in making this possible and when you have a single domain, you can cut it down to as many subdomains as you want to work with.
The subdomains are a better method of keeping your website organized and your web applications can each reside on a different subdomain. The process of separating the website into subdomains makes sure that every file that you have is stored in the correct place and whenever you are guiding a new visitor to one of your subdomains, they will not be aware of the other subdomains in the same establishment.
A single domain name can have several subdomains but only the people that know the address of the particular subdomain are able to access it. This means that if your hobby is making web applications and hosting them on the internet, each web application will be hosted on a different subdomain and you will not have to be worried about giving access to your friends.
A subdomain is totally different from the main domain where you can host your main website and with a subdomain, you are free to have as simple or as complex a website as you wish to have for yourself. Subdomains separate concerns for your website and make it possible to arrive at the information in the simplest manner possible and whenever you separate your website into subdomains, you are making it more organized and easier to get through.
A website can be turned from the simple version of itself to the very complex setup you have been dreaming about with the use of subdomains that are designed to get the website up and running as well as making the website easily maintainable. A website that is easy to maintain through the use of subdomains also provides more functionality to the user and makes it possible to have as much data traffic coming into the same domain from different sources.
Subdomains have been used for keeping a website organized and separating entities of the website whenever you need to have a lot of information or web apps on the same domain but under different sections.
The use of subdomains for keeping a website organized has made it possible to have better organization of information and many businesses and organizations have found the usefulness of the subdomains whenever they need to host an online event and share files or get people to fill forms.
Filling forms through a subdomain and interacting with a web application makes for memorable events and gatherings in which the participants are all in remote places but can interact with the information and provide their feedback in real-time. You also have the freedom to delete subdomains that you are done with and this encourages experimentation, especially with web applications.