Next.js is a popular web development framework built on React that helps developers create websites and web applications. It's widely used by software developers and development teams to build everything from simple websites to complex web platforms.

This tool installs command-line programs on your computer, which requires elevated system permissions and could potentially run malicious code. However, Next.js has an exceptional track record with 160 million monthly downloads and no detected external data flows, meaning it doesn't send information to outside servers. The main concern is that the current package maintainer's identity isn't verified by the platform, though this is common for many legitimate packages.