How can I tell if my Audi 80 needs new spark plugs?

I've noticed some hesitation and lack of power in my Audi 80 and I'm wondering if the spark plugs might be the issue. What are some signs that it's time to replace them?

When your spark plugs wear out, they can cause a variety of issues with your vehicle. Some common signs that your spark plugs need to be replaced include difficulty starting the car, lack of power and acceleration, and poor fuel efficiency.