The text filter in Shotcut is a tool that allows users to add text to their videos. It is located in the "Filters" tab of the Shotcut toolbar. It is a convenient way to add captions, titles, or other text to your videos, and is used in combination with other filters and effects to create a polished, professional-looking video. The text filter is simple and does not support multiple sizes. If you need different sizes, use the Overlay HTML filter.