Definition
The rate of new comments per hour on a Reddit thread, used as a Google crawl priority signal.
Comment velocity is the number of new comments a Reddit thread accumulates per hour, particularly in the first 24 hours after posting. High comment velocity (>10 comments/hour in the first day) signals authentic, high-quality engagement to Google's crawler, which accelerates indexation and can boost ranking position. Comment velocity is one of six signals in Subredify's Rank Opportunity Score, weighted at 20%.
In context
Google's crawler visits high-DA Reddit threads more frequently when they're generating high comment velocity, updating its indexed version of the thread and potentially promoting it in search rankings. This creates a direct relationship between early comment engagement and SEO performance.
Every Reddit thread in your feed shows Comment Velocity alongside ICP score and compliance rating.
Try freeRelated terms
Rank Opportunity Score
A 0–100 score predicting whether a Reddit thread will appear in Google's top 10 results within 72 hours.
Upvote Velocity
The rate of upvotes per hour a Reddit thread receives in its first 6 hours, used as a Google ranking signal.
Thread Indexation Window
The 2–72 hour period after posting when Google prioritises Reddit threads for fresh content indexation and ranking.
Subreddit Domain Authority
The effective SEO authority a subreddit inherits from Reddit's domain, modulated by subreddit size and engagement.
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