How To add meta keywords into blogger

Steps:
Goto Design\Edit Html 
Then look for below underlined and add below entries .

<b:include data='blog' name='all-head-content'/>

<meta name="title" content="IpohTech" />
<meta name="description" content="IpohTech" />
<meta name="keywords" content="IpohTech,Computer,Acer" />
<meta name="author" content="YEONG" />
<meta name="owner" content="YEONG" />
<meta name="copyright" content="(c) 2011" />

Why do we need META KEYWORDS? It's used to optimize your webpage for ranking when doing search on search engines..