Where can I put the meta tag for Pinterest to verify my website?
These are the steps that Pinterest suggests:
Copy the meta tag that looks like this:
<meta name="p:domain_verify" content="90b0c9e0e9ce97cc165c42c4663542beb"/>
Leave the verification page open and go to your blog’s Settings page. (in a new tab/window).
Click on the Traffic tab and paste the code into the Pinterest field under the Site Verification Services section.