What is a Sub Domain?
A sub domain is a domain that is part of a larger domain, the only domain that isn’t also a sub domain is the root domain. For example, online-training.srihithatechnologies.com is the sub domain for www.srihithatechnologies.com which in turn is a sub domain of the “com” top-level domain.
Uses of Sub Domains:
Sub domains are commonly used by organizations that wish to assign a unique name to a particular department, function, or service related to the organization. For example, a Training Institute might assign “online training” to one of its department, such that a number of hosts could be used inside that sub domain, such as mail.onlinetraining.srihithatechnologies.com
Some websites use different sub domains to point to different server clusters. For example, www.srihithatechnologies.com points to Server Cluster 1 or Datacenter 1, and
online-training.srihithatechnologies.com points to Server Cluster 2 or Datacenter 2, etc.
2: How do you set them up?
Setting up of Sub Domain is usually free. It depends on the web hosting company. Various combinations of sub domain configurations are possible by using DNS server entries and web server application setup for load distribution, application isolation or security purposes.
Sub domains should only be used when you have enough vertical content to support a stand alone Web site. Sub domains are effective because they “piggy back” on the value of the root domain, whereas if you bought a new domain, it would have no authority/age.
When we create sub domains we need to create pages with quality content. Sub domains have a great deal of value in the search engines. Search engines value the root of the sub domain (example: subdomain.rootdomain.com) as another home page for the Web site.
We can focus Seo efforts for home page to the most competitive keywords.
If you have multiple verticals of your business competing for search engine ranking, you can build a sub domain /content strategy to help you gain traction for multiple sets of competitive keywords. Don’t create sub domains if you don’t have enough quality content to support a full-fledged Web site.?
A “sub domain” expresses relative dependence, not absolute dependence: for example, srihithatechnologies.com comprises a sub domain of the com domain, and online-training.srihithatechnologies.com comprises a sub domain of the domain srihithatechnologies.com