I have multiples url's directing to a single page, ex:
www.example.com.br/phone-calls-right-now
www.example.com.br/phone-calls-for-yesterday
www.example.com.br/phone-calls-cheaper
www.example.com.br/phone-calls-for-free
and redirecting 301 to this single page:
www.example.com.br/phone-calls
This is acceptable? the search engine see like a duplicated content?
If it's an empty page, there is an way to put an <meta name="robots" content="noindex, follow"> and let it there?
This is acceptable, and unless something else is going on, should not result in a penalty.
You have four phone-related URL's, and they're permanently redirecting to a single phone-related URL. This is semantically proper, as search engines are concerned. If they were not related, it might constitute a problem, but as it stands, there's nothing illegal here.
Duplicate content would occur if you had two pages that were almost identical in their content in the SERPs.
If you were to use a "noindex, follow" meta robots tag, your old URL would not redirect the user to an updated page, and would still be accessible if a hyperlink to the old one existed somewhere in your content or navigation. If the page is empty, however, your concern comes down to, does a link to it live somewhere on your website, and do you want to hide it from the search index or also from your website users? But that depends on your specific case.
