What is the fine-grained topic of the following text: Along with the bigger calibre acts they bring in each year, the festival has successfully managed to upscale its venue as its new current home is The Arch located on the seafront and is a perfect central spot in Brighton, whereas previously the festival has hosted at different and smaller venues across a weekend, highlighting again the growth and expansion of this massive metal event. Only return the topic.
Growth and expansion of a metal music festival in Brighton