Blogging and microblogging tend to get disrespect from folks who “just don’t get” the purpose for them and consider them at best mindless entertainment and at worst an attention-sapping pest.
As a second-generation programmer, I found that I “got” them pretty quickly.
My dad programs for embedded and industrial-control systems; I grew up watching him bring home stacks of trade magazines — not to read every article in detail, but to skim through as an environmental scan, updating his awareness of the state of the art. If anything the ads and editorials were far more useful to him than the articles!
As a web developer in the 2000s, I started to use blogs and microblogs much the same way: little bits of information here and there which fill in my background map of what’s current among my peers (say, everything awesome in web browser work).