#1. You want your subscribers to be from your target market, or have influence with your target market.
#2. To get and keep those subscribers, your content - whether it's articles or advertisements - needs to be interesting or useful to your target market. Let me repeat that: your content is for your target market. Which means it's not about you - and doesn't even have to be about what you do.
If you are starting out, before you think about what you want to include, first think about what your subscribers would want. If you can find an answer to this question, you've got it made:
What can you give your target market that they can't get anywhere else?