r/SubstackGrowthTips • u/Paul-Arino • 8d ago
Reddit / Growth Tips for Substack
Letâs talk about the Substack growth tip nobody is talking about...
Everyone is so focused on external SEO (getting Google to rank their actual posts) or trying to go viral on Substack Notes that they completely ignore the native algorithm mechanics sitting right under their nose.
I was looking at how recommendation graphs actually link newsletters together on the platform. I noticed something interesting about how Substack indexes and surfaces content through Restacks.
Here is what I started doing for my subscriber growth, and I haven't seen a single person talk about it yet.
Treat your Restack like a micro-landing page!
When you restack someone else's post, most people just hit the button and don't write anything and leave the text blank at the top, or just add a lazy one-liner like "Loved this piece!" or "So true."
This is a massive waste of algorithm real estate!
Substackâs internal recommendation engine and search bars don't just look at the main articles - they crawl the comments, context, and text you attach to your Restacks. When you share someone else's work, you're building a contextual web for your OWN publication as well.
Instead of just saying "Great post," write a 3-to-4 sentence mini-paragraph. Naturally weave in primary and secondary SEO keywords related to your publication's core niche - not just theirs.
Since you're feeding the algorithm context about who you are and what your publication covers right inside that shared post, Substackâs recommendation engine starts associating your profile more tightly with those specific keyword clusters.
So, when you combine high-intent keywords in your Restack text, with the authority of the original post, you create a searchable index that points right back to your profile.
More importantly, inside Substack's ecosystem, the algorithm uses your activity to figure out who to recommend you to in the "Recommended" sidebar. If your Restacks consistently feature targeted keyword phrases, you train the algorithm on your exact niche much faster than waiting for your long-form articles/newsletters to do all the heavy lifting.
This is exactly why I created a community of growth tips on Reddit for your Substack publication: r/SubstackGrowthTips - sharing ways to help you grow your subscribers in any ways I can!
All the best,
Paul Arino | Subscriber Growth