Analyzing Word Choice: Barrage in Context

A passage discusses the impact of technology on modern education. It states:

"While the advent of online learning resources has made education more accessible, it has simultaneously given rise to concerns about students' attention spans and retention of information. Critics argue that the constant barrage of notifications and the temptation of distractions undermine the quality of learning. Proponents, however, assert that technology fosters engagement and allows for a more personalized learning experience."

What is the effect of the word 'barrage' in the context of the passage?