One of the hardest things to measure is your marketing, how many people got your message, read your blog, visited your site.
There are programs that can give analytics for all the above, heck google is one of the best!
My advice...think in the power of ONE, if one person who didn't know about you finally does then your marketing has value. Don't over think or under value what I'm saying. Sometimes in life it only takes one!
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