Algo Arena is a web based Data Structures and Algorithms practice tracker for technical interview preparation. It organizes practice into topic zones and lets users mark questions as complete, providing a record of their activity and progress. Listed topics include two pointers, sliding window, prefix sum, binary search, sorting, linked lists, stacks, and queues. The site also refers to arrays, strings, trees, and graphs as areas to practice. Users can work through questions by topic, track completed problems, and review areas that may need further attention. A typical workflow is to set a weekly practice target, solve questions, note challenging concepts, and revisit problems later without hints. The site includes a login option to save progress. Its described role is as a progress dashboard; the available information does not specify platform requirements, pricing, or integrations.