The interviewer would like to know more about the types of decisions you are accustomed to making in the workplace. The way you answer this questions will give them a good idea of your level of experience, seniority, and ability to handle the decision-making requirements in this possible position.
If the job you are interviewing for requires you to be decisive and quick on your feet, you will need to be able to provide examples of how you have done these things in the past. If you worked in tech support, you faced problems that you needed to find solutions for on a regular basis. If you worked as a sales rep, you might have required to know how to negotiate and make decisions on prices and benefits you can give your customers.
You may have faced decisions that became so routine you didn't think twice! Refer to these types of decisions and be sure to highlight how these types of decisions have prepared you for a role like this one.
"In my previous position I was quite often required to make decisions on staff scheduling as well as hiring and terminating. I feel that role prepared me quite well for a position like this one. I have well-honed decision-making skills and my intuition, when it comes to hiring, has been elevated."
"I was responsible for planning the content calendar: emails, blog post topics, and timing, social media posts, in addition to actually executing the plans. That means everything from creating web copy, to choosing images, and the like. Also, I collaborate with management to decide what promotions and sales we will be running, and when."