1. Suction power: The strength of the vacuum's suction determines how effectively it can pick up dirt and debris from surfaces.

2. Filtration system: A good filtration system helps to trap dust, allergens, and other particles, improving indoor air quality.

3. Attachments and accessories: Vacuum cleaners often come with various attachments such as crevice tools, upholstery brushes, and dusting brushes to help clean different surfaces and hard-to-reach areas.

4. Bagless or bagged: Some vacuum cleaners have a bagless design, while others use disposable bags to collect dirt and debris.

5. Cord length: The length of the power cord can affect the vacuum cleaner's reach and convenience during use.

6. Weight and maneuverability: Lighter and more maneuverable vacuum cleaners are easier to use and store.

7. Noise level: Quieter vacuum cleaners are less disruptive, especially in shared living spaces.

8. Power source: Vacuum cleaners can be corded (plugged into an electrical outlet) or cordless (powered by a rechargeable battery).

9. Adjustable height settings: Some vacuum cleaners allow you to adjust the height of the brush roll to accommodate different types of flooring.

10. Automatic features: Some high-end vacuum cleaners come with automatic features like self-cleaning brushes, smart sensors, and programmable cleaning schedules.