Real estate investment refers to the purchase, ownership, management and sale of real estate properties with the intention of generating income or capital appreciation. There are several different types of real estate investments that beginners should know about:

1. Residential properties - These are properties that are intended for people to live in, such as single-family homes, duplexes, and apartments. Investors can generate income by renting these properties out to tenants or by flipping the property for a profit.

2. Commercial properties - These are properties that are intended for businesses to operate from, such as office buildings, retail spaces, and warehouses. Investors can generate income through rental income or through appreciation of the property's value.

3. Industrial properties - These are properties that are intended for manufacturing or storage, such as factories or warehouses. Similar to commercial properties, income can be generated through rental income or appreciation.

4. Raw land - This type of real estate investment refers to purchasing land that is undeveloped, with the intention of holding it for future development or sale at a higher price.

5. REITs - Real Estate Investment Trusts are a way for investors to invest in real estate indirectly. REITs own and manage income-producing properties, such as apartment buildings, shopping centers and office buildings, and distribute the income earned from those properties back to shareholders in the form of dividends.

6. Real estate crowdfunding - it's an online platform that enables multiple investors to pool their money together to fund real estate projects. The platform connects investors with developers or property owners who are looking to raise capital.

7. Vacation rental properties - it's properties that are purchased and managed as a rental property with the intention of renting them out to vacationers.

It's important to note that different types of real estate investments come with different level of risks, benefits, and management. Therefore, it's important to conduct thorough research and to consult with a professional before making any investment decision.