To use this 2.2-inch TFT LCD display, first connect it to your microcontroller following the wiring tutorial. Make sure to choose the right power supply, either 3.3V or 5V. You can use the provided open-source graphics library to draw all sorts of things on the screen, like pixels, lines, and text. If you want to show full-color bitmaps, insert a FAT16/FAT32 formatted microSD card into the holder. Remember, this TFT is discontinued, and the new 2.2-inch TFT in the store isn't a direct replacement. When handling the display, be gentle as it uses a delicate flex-circuit connector. For maintenance, keep it in a clean and dry place. If you face any issues, refer to the datasheet and the example code provided.