There is no CRO subreddit. Here is where the conversations actually happen
If you have a conversion problem and want to ask someone who has solved it, the obvious move is to find the conversion rate optimization community. It does not exist.
We checked. r/CRO, r/conversionrateoptimization, r/webanalytics and r/abtesting are either absent from the public archive entirely or effectively dead: between zero and six posts since January 2024. r/martech has eight. A discipline with a multi-billion-dollar tool market has no home community.
So the conversation happens somewhere else, spread across communities that are nominally about other things. We measured where.
Reading rooms is not the same as reading your own funnel. A free scan checks your live site for the conversion, tracking and speed failures costing you revenue, priced in dollars.
Method
We queried 4.8 million public comments and roughly 700,000 posts across twenty ecommerce, marketing and analytics communities, covering July 2025 through June 2026. For each one we measured how many posts are about conversion topics (conversion, checkout, cart, A/B testing, landing pages, attribution, funnels, tracking), how many are questions someone could actually answer, and how densely the conversation references tools in the category.
Density matters more than volume, which is the whole point of what follows.
Where the answerable questions are
| Community | On-topic questions per week | Average replies |
|---|---|---|
| r/PPC | 10.5 | 9.7 |
| r/DigitalMarketing | 8.6 | 6.0 |
| r/shopify | 6.6 | 9.8 |
| r/AskMarketing | 5.3 | 5.0 |
| r/ecommerce | 5.2 | 9.5 |
| r/analytics | 1.4 | 5.3 |
| r/GoogleAnalytics | 0.8 | 6.8 |
| r/GoogleTagManager | 0.6 | 6.6 |
About 36 answerable conversion questions a week across the top five. That is the entire public surface of this discipline, and it is smaller than most people assume.
r/PPC is the surprise
The single best place to discuss a conversion problem is a community about paid advertising.
11.8% of r/PPC posts are about conversion, tracking, landing pages or funnels — the highest concentration of any large community we measured. It also carries the densest tool conversation: 25.6 attribution-tool mentions per 10,000 comments, nearly double the next community.
The reason is structural. Paid acquisition makes conversion problems expensive immediately. If your checkout breaks and you have no ad spend, revenue drifts down and you might notice next quarter. If your checkout breaks while you are spending $500 a day, you feel it this week and you go looking for help. Advertisers are the segment with the fastest feedback loop on conversion failure, so they are the segment that talks about it.
r/smallbusiness is the trap
r/smallbusiness looks excellent on raw counts: 902 conversion-topic posts in the window, more than r/shopify and r/ecommerce combined.
It is the worst place on this list to have this conversation. At 745,000 total comments, its relevant-tool density is 1.0 mention per 10,000 comments — roughly ten times more dilute than anywhere else. Your question is one of hundreds that day, most about payroll, insurance, and difficult customers.
This is a general lesson about picking communities. Absolute post counts scale with community size and tell you nothing. Density tells you whether the room is actually about your problem.
The small, pure rooms
r/GoogleTagManager and r/GoogleAnalytics produce under one relevant question a week each. They are also the purest: 24.5 and 21.7 tool mentions per 10,000 comments, the highest density we measured anywhere.
If your problem is specifically measurement — tags not firing, conversions not recording, two properties collecting at once — these are the rooms where everyone present has debugged exactly that. Low volume, very high hit rate.
Where not to bother
Some communities remove most of what gets posted. Share of posts removed, by community:
| Community | Posts removed |
|---|---|
| r/sales | 92% |
| r/marketing | 88% |
| r/SEO | 86% |
| r/EntrepreneurRideAlong | 82% |
| r/dropship | 80% |
r/SEO is the notable one. It has the highest reply counts of anything we measured (13.6 on evergreen tool threads), and it removes 86% of what arrives. High engagement on the small fraction that survives, terrible odds of surviving.
What this means if you are trying to solve a conversion problem
Ask in r/PPC, even if you are not running ads. Highest topic density, highest reply rate, most permissive moderation of any community we measured.
Ask in r/GoogleTagManager if the problem smells like measurement. If your numbers disagree with each other, that is a tagging question, not a CRO question, and there is a room full of people who do only that.
Do not ask in r/marketing or r/SEO. Your post probably will not survive.
Do not assume the big community is the right one. r/smallbusiness has the volume and almost none of the relevance.
The honest caveat
Public archives lag and sample. [removed] conflates moderator action, automod and author deletion, and reflects whatever state the crawler saw. Treat the removal percentages as strong directional signals rather than precise moderation rates. The density figures, which come from millions of comments, are the more reliable half of this analysis.