It’s not a very new experiment and has been available to some selected pro subscribers for a while. However, for free users, it might be new. There is a separate tab called Tools with the Lab icon, which leads to the Describe page. There you can upload any image, and it will provide you with four different descriptions, which you can use later on as a prompt to create a similar image through Midjourney afterwards.
Recently, Midjourney opened its web UI to free users, offering free credits for image generation. This event coincided with the release of the latest model from Ideogram, and it is likely that this move from Midjourney was made to keep up with the competition.
Midjourney is a generative AI tool that allows users to create high-quality images from natural language prompts. It is popular among artists, designers, and hobbyists who use it for rapid prototyping, creative exploration, and visualizing ideas.