Silk thread and cotton thread have their own advantages. Silk thread is bright and smooth, and the color will be more gorgeous. However, the color transition is not as natural as cotton thread. Silk thread is not as easy to control as cotton thread, and it is too slippery, which leads to the need to embroider a needle. If you are a novice, you should choose cotton thread. If you are very confident in your embroidery, you can try it, but you'd better buy a smaller one first and try the feeling of silk thread. It looks like it is very complicated. If you can't control silk thread, you won't cry. There are also silk threads that are too smooth and easy to leave blank when embroidered.