My conversion rate went from 2.5% to 8% just by including Facebook polls where SiteGround was rated #1, along with a few Twitter screenshots and Facebook conversations. Whether it’s Amazon reviews or Facebook polls, you NEED to include outside opinions – that’s why I don’t like collecting reviews on my website – they look biased. But you can use WP Review Pro to do this, allowing people to review the product/service on your site and get those review stars.
The products and services you will be promoting to your audience must be relevant and good quality. Make sure you believe in them and know everything about them, because this will be crucial to you delivering the sales pitch to your audience. You need to build trust with your audience so make sure the products and services you choose to promote are trustworthy enough.