Search engines often recognise multiple websites on a single domain and this is not good for your overall ranking strategy. It’s best that you use what is called a 301 redirect to identify a single website on your domain.
Technically, a website can exist in several guises in a single hosting location. For example:
https://www.boomerangbooks.com
These are all considered to be ‘different’ websites by the search engines, even though they resolve to the one place. Unfortunately, this can mean that search engines index different versions of your website, which has the effect of ‘watering down’ your overall link volume.
The impact of this can be keenly felt if an important link partner is linking to the version of your website that has been excluded from search results, due to duplicate content reasons.
You can get around this problem by using a 301 redirect, which helps you to maintain a single version of your website and redirect any links to the correct location.
There are several ways to do this. For more information, take a look at this article on 301 redirects
Tags: 301 redirects, SEO