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I am not sure about these free blogs, but if you can add code to a page and the footer via a widget, then the process is the same as WordPress.

I did it after learning a bit, you can take a look, and I removed the widget of google +, now I am completly advertizing steemit. ☺

Great. What's the url again?

It looks good there. Thank you for testing that on blogspot!
Screen Shot 2018-03-21 at 3.52.51 PM.png

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