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I am not an SEO by any means and would appreciate any advice I can get as I try to understand this field just a tiny bit better. I own an Etsy shop and have a blog that promotes my products (party supplies) and feature birthday parties that have been thrown by moms/party planner, etc. I've been fortunate to meet a group of great blogging friends in my niche along the way. Every Friday,  we have been sharing one post from each other's blog in a round up post to try and drive a bit of traffic to each other. Is this something that would be penalized by Google? Thanks so much for your time.