Recommendation systems can lead to better conversion rates and it drives up customer engagement. That being said, there are many strategies that can help you with your online store's product recommendations.
Social proof is an effective tool for landing page optimization. You can use this idea on your landing page to help potential customers to believe in your product.
I don't buy anything without checking reviews online or even asking people I know if they have tried this product or service before. Being online for so many years now it's just in my 'DNA'.