If you have something concrete and unique to offer people in a blog, then yes. Otherwise generally no, unless you're perhaps trying to give people a library of

If you have something concrete and unique to offer people in a blog, then yes. Otherwise generally no, unless you're perhaps trying to give people a library of your technical work that they can refer to when you're applying for a job. For someone who's unknown or just another face in the crowd, a successful blog should have some unique information, analysis, or authority on something specific. If you're someone famous, then your take on things you've seen and observed and lessons that others can benefit from, which they don't get to experience / glimpse in their daily life. If you're just someone with an opinion, all you're doing is working out your need to publish your thoughts to randos. Unless your writing is super insightful, the only person it benefits is you (pretty much). (Again, unless your blog serves to collect your work for applying to a job.)