Facebook Custom Audience + Pixel

Facebook Custom Audience + Pixel

Hi,

We're setting up some Facebook advertising and were wondering a few things:

#1 where do we put the facebook pixel on a landing page? Is it in the Custom HTML under the Meta Tags?

#2 Is it a requirement that you have a Business Ads Manager in order to send the custom audience from Marketo to Facebook? Or Can you just send the custom audience to Facebook's Ad Center?

Thanks

-Leticia