What is the best way to securely fasten a shelf to the wall using a screw and anchor set?

To securely fasten a shelf to the wall using a screw and anchor set, first, drill a hole into the wall with a drill bit that matches the size of the anchor. Insert the anchor into the hole and then place the shelf against the wall. Use a screwdriver to drive the screw through the shelf and into the anchor, securing the shelf in place. Make sure to use the appropriate size and type of anchor for the weight of the shelf to ensure it is securely fastened.