The search volume for this term has exploded for three primary reasons:
The "paper" you might be looking for is likely one of the many security research reports technical blogs vercel.app unblocker
Vercel is a popular platform for deploying web applications, offering a free *.vercel.app subdomain for every project. Because these subdomains are free and incredibly easy to spin up, they became the primary tool for students and developers in regions with heavy internet filtering (like Nigeria or Malaysia) to host proxy sites or "unblockers". The search volume for this term has exploded