As quickly and clearly as possible, your Home page has to answer the five questions every user has in their head when they enter the site for the first time:
There are three important places on the page where we expect to find explicit statements about the site:
This is a summary of NN Group's top 10 guidelines for Home page usability:
If you want to get in more details, you can go through the entire post here: Top 10 Guidelines for Homepage Usability.
Remember, at the end of the day, your Home page is a shared resource between all departments within the company — anything on the Home page gets promoted the most, so as a company, you will have to focus and decide carefully what needs to surface to home.