I use it to follow subreddits, scrape posts, analyze based on arbitrary criteria, note the findings in a spreadsheet, then send a notification.

An example i set up recently was getting a notification on telegram whenever I deploy a vercel site (our build process is slow so can take 20 min). Webhook from Vercel -> filter on the author -> send notification to telegram.

The perfect usecase for n8n is when you got integrations and you dont need to run the workflow so often