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by ReidZB 4715 days ago
StackExchange has a "favorite tags" feature which will highlight specific tags on the front page (and for busier sites, it may even bias its display on them, though I'm not sure about that).

There is also an advanced "filters" functionality (visible at stackexchange.com/filters) which apparently lets you filter out all but certain tags, as well as have 15-minute/3-hour/daily emails with new questions in that tag. I have never used it, but it sounds like what you're aiming for.