1. Recognition and place within a community. * Some of my new colleagues admitted reading my posts when searching for something. * I was confident linking my (

1. Recognition and place within a community. * Some of my new colleagues admitted reading my posts when searching for something. * I was confident linking my (commercial) book in a subreddit in which I post useful and free articles. 2. Improving as a writer. * You need to write to improve writing (obvious). * Better writing helped me to write and publish a technical book. 3. Marketing. * I used my blog as a main marketing channel for my book when I released it. Note that I haven't started for those reasons per-se. I started long time ago to simple share knowledge on the internet.