Www or not?

Many people ask me if it's good that the page has the "www" or not having the "www", but only the http://laweb.extension

The truth is: It does not matter.

What is really important is that your page does not open in both options. That is, if you write your web page with the www and opens and then try without the www and also opens up ... you have a serious problem of duplicate content.

It is important that you decide if you want to use the www or not and then redirects the other option. For example, if you decide that your page is http://www.tupaginaweb.latextension, when you or anyone else http://tupaginaweb.laextension type (without the www) should be redirected to http://www.tupaginaweb . latextension.

You can do this with either a 301 redirect in PHP or via htaccess. Anyway, do not let your page has both versions.

Some people think that the duplicate content penalty is applied to place the same content as other pages on your website. When in fact, really serious duplicate content is that which exists in your own website.