1. Keep Your Brand Consistent - One of the most important things you want to do maintain your brand’s image and consistency across all platforms. A subdomains let’s you keep all of your branding information's the same while also making sure that all of your sites are connected together in one way or another.
2.You can have different content on each subdomain - Having multiple page on the some site with the same exact information can get a little boring, even you are giving all the details about your product or services. A subdomain solves this problem by letting you have one site with different pages that are focused on individual parts of your business.
3. Search Engines Crawl Subdomains Just Like They Do Website - Since subdomains are essentially smaller websites, they are crawled by search engine bots just like any other site. This means that in addition to your website showing up when people search for your business name, you can also benefit from having individual pages rank well when people look for more specific topics or keywords.
4. You Can Better Promote Your Subdomains On Social Media - Since a subdomain is a specific website within a larger one, you can also promote it on social media platforms. This allows you to target people who are specifically interested in the topic at hand and get them to visit your site directly instead of linking out to it or having them search for your business name.