The meta tags are very versatile code that should be located immediately following the blog title, in the blog header. You'll be using the Template Editor to view, and to modify, this code. As always, if you intend to make changes to the code, backup the template before and after making changes.
In a Classical template, you'll have something like
<head>
<title><$BlogPageTitle$></title>
<meta name="description" content="The Real Blogger Status: What Blogger Won't Tell You"></meta>
<meta name="keywords" content="Blogger, Blogspot, blogger.com, blogspot.com, outage, ..."></meta>
<meta name="verify-v1" content="xxxxxxxx" />
<$BlogMetaData$>
In a Layouts template, you'll have something like
<head>
<title><data:blog.pageTitle/></title>
<meta content='The Real Blogger Status: What Blogger Won"t Tell You' name='description'/>
<meta content='Blogger, Blogspot, blogger.com, blogspot.com, outage, ...' name='keywords'/>
<meta content='xxxxxxx' name='verify-v1'/>
<b:include data='blog' name='all-head-content'/>
<b:skin><