There are sub domains and there are sub directories. Which one do you have to use?
An instance of a sub area is key phrase.instance.com. An instance of a sub listing is instance.com/key phrase.
Normally, most websites ought to use sub directories as a result of their web site is on one subject. However when your web site is on a number of subjects it is best to use sub domains.
For instance, as an instance you will have a weblog about entrepreneurship and know you need to discuss shares and investing. If you wish to place that content material in your web site it’s possible you’ll need to think about inserting it on a sub area.
When you have a big web site that’s fashionable and excessive in authority, comparable to a website like Huffington Put up, you’ll be able to put all the things in a sub listing, however typically, you need your web site to solely be on one subject.
Whether it is on one subject, use sub directories and whether it is on a number of subjects think about using sub domains.