What does it mean that the compounding effect of consistent output?

Example: A software engineer publishes one technical blog post per week for three years; post number 47, a routine piece on database indexing, gets shared by a VP of Engineering at a company the author admires and leads to a job offer that would never have appeared on a job board.

Try this: Catalog every piece of output you have published or shipped in the past twelve months, count the total, identify the one piece that generated the most unexpected consequence, and write a one-paragraph analysis of why that particular piece — and not the one you expected — was the one that compounded.