Here are few tips what all elements your landing page may have

-The benefits/USP/features of your offering/ product or services

· Summary/Bullet points of benefits

· Detailed features

-Images/Videos

· In the context of the use of product or services

· Client’s testimonials

-Introduction of the product or services/summary

-Price details/special offer

-Call to action

· Buy/subscribe/download etc

· Payment/Checkout button

· Lead form

-Social Shares

-FAQs

-Your contact details in case of query

You do not require to choose all but as many as you can to give comprehensive details to help your visitors take action to buy your products or services.