A subdomain is an extension of your main domain name and is used to organize or separate different sections of your website. It acts like a dedicated space under your primary domain, allowing you to create specific areas for blogs, stores, support pages, or apps without needing to buy a new domain.
For example, if your main domain is harmonweb.com and you want to create an online store, you could use a subdomain like shop.hostingnigeria.com.
The structure is simple: the subdomain appears before the main domain and is separated by a dot. In this case, "shop" is the subdomain, while "hostingnigeria.com" is the main domain.
Subdomains are commonly used for e-commerce stores, help centers, login portals, blogs, mobile versions of websites, and testing environments.