Once you have your code, enter the content section of your verification code in the Content field within the Pinterest tab.
Click Save.
How do I obtain my verification code for Pinterest?
If you do not already have a verification code:
Head over to your Pinterest profile and click 'edit'.
Click on 'Settings' and then 'Claim'.
Enter your domain/URL in the 'Website' input box and then click 'Confirm Website' as shown in figure 1 below. You will then need to copy the text within the content part of the meta tag highlighted in yellow in figure 2 below.
Figure 1
Figure 2
You now have the code that you need to enter in the contentfield of the Pinterest verification section.