The main function of the 中國香港倉頡\速成\筆劃for GO Keyboard is to make the input of Chinese characters more convenient. It can quickly predict the Chinese character you are about to input, so you need not make any other moves. 

Besides, it can also analyze the words you typed and give you suggestions on how to improve your writing. The more you use the app, the more you will learn about its functions. In the meantime, you can download and install the dictionary pack so that you can use the function of word prediction.