Subject Line Hack
Ask your customers to provide you with a short 1-2 minute video testimonial, ask them to cover some key points such as problems they were facing, how your product helped them solve these issues and how it benefited them. It's great to give real-world examples, especially when others can relate to this. Then you can embed the video onto your Landing page as a form of social proof.
Another benefit of this is videos improve time spent on the page which as a fundamental SEO ranking factor.
💡 upload to YouTube and Wistia as well.