Should use Robot file or Code for website ?

[hoangvu]

Hi everyone,

I have 2 ways to control Google robots crawl some web pages that I didn't want to cache

Method 1:
Disallow: / your page.php
Disallow: / folder name
....
in robots.txt file

Method 2:
<meta name="robots" content="noindex,nofollow" />

embed in meta tag of your website to avoid google cache your pages.

According to you, which way I should use and it's best effective and why ?
which case we should robots.txt for our website ?

any shares ?