You have created a central composite design with three factors that will be run in two blocks. This design is both rotatable and orthogonally blocked - see Central composite designs.
Because you chose to display the summary and design tables, Minitab shows the experimental conditions or settings for each of the factors for the design points. When you perform the experiment, use the order that is shown to determine the conditions for each run. For example, in the first run of your experiment, you would set the time (A) at 9 minutes (1 = high), the temperature (B) at 60° (1 = high), and use 7.5 grams of the catalyst (C) (1 = high).
Minitab randomizes the design by default, so if you try to replicate this example, your run order may not match the order shown.