Real Estate Professional Definition

[Azin Eftekhari]

Hi everyone,

Can someone kindly explain the phrase underlined below in simpler English? 

A qualified real estate professional is a taxpayer who owns at least one interest in rental real estate that:

• Performs more than 50% of their personal services in real estate trades or businesses in which they materially participate, AND
• Spends more than 750 hours of services during the tax year in real property trades or businesses in which the taxpayer materially participates.