Adding Meta tags in aspx page within Master Page

Hi

I need to add Meta tags, description and keywords in aspx page. My aspx pages are in master page and I have already added meta tags and description in my Master Page.

Now I want add in my other pages also so if someone search my site on GOOGLE it should look like same as this:

https://www.google.co.in/webhp?hl=en&tab=ww#hl=en&gs_nf=1&cp=6&gs_id=o&xhr=t&q=asp+snippets&pf=p&sclient=psy-ab&oq=aspsni&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=30dab6167dc53905&biw=1360&bih=677

How to achieve this?