Based on the grammar, "that playfully sing and dance" refers to pages. The grammar works fine. But it's clumsy, and should be This is where you hire a copywri

Based on the grammar, "that playfully sing and dance" refers to pages. The grammar works fine. But it's clumsy, and should be This is where you hire a copywriter for your website who can fill cleverly-crafted prose into pages that sing and dance.