Trending Topics
Trending Topics in Salesforce Chatter is a feature that surfaces the hashtag topics currently receiving the most posts and engagement across the organization.
Definition
Trending Topics in Salesforce Chatter is a feature that surfaces the hashtag topics currently receiving the most posts and engagement across the organization. The list updates as activity changes, so it acts as a real-time pulse of what employees are talking about right now rather than an all-time popularity ranking.
The feature sits on the Chatter overview page and on topic detail pages, and it ranks topics by a weighted score of recent posts, replies, likes, and views. Clicking a trending topic opens a feed of every post and comment tagged with that topic across the org, regardless of which group or record the conversation started on.
How Trending Topics ranks, where it shows up, and what makes it useful
How the trending score is calculated
Trending Topics is not a raw post count. The platform calculates a weighted score for each topic that blends recent post activity, replies, likes, and view counts against a decay function so that older activity drops out of the ranking. The decay window is roughly a few days, which is why a hot topic from last week can disappear from the list once the conversation cools. The exact weights are not published by Salesforce and have shifted across releases. Treat the list as a directional signal of recent conversation, not as a precise leaderboard. The ranking refreshes throughout the day, so a topic that gains a sudden burst of activity can climb the list within hours.
Where trending appears in the Chatter UI
The trending list shows up in three places in the Lightning Chatter experience. The Chatter overview page shows a Trending Topics card in the right rail. The Topics tab inside Chatter shows a longer trending list with topic descriptions and follower counts. The topic detail page shows related trending topics underneath the main feed. Classic Chatter still has the card on the home page, although the rest of Classic Chatter is end-of-life. Mobile shows a condensed trending list inside the Chatter tab. The same trending score drives all three locations, so what climbs in one place climbs everywhere.
Topics, hashtags, and how trending picks them up
Trending Topics ranks Topic records, not raw hashtags. When a user types a hashtag in a post, the platform creates or attaches a Topic record with that name and links the post to it through a TopicAssignment. From that point on, every post or comment that uses the same hashtag adds engagement to the same Topic, and Trending Topics ranks the underlying Topic, not the literal hashtag text. This is why two different spellings of the same hashtag (Q4Results vs Q4-Results) can show up as two separate trending entries until an admin merges the Topic records. Merging topics is a Setup-level action and only an org admin or a designated topic moderator can do it.
Permissions, visibility, and what each user sees
Trending Topics respects feed visibility. A user only sees trending topics whose posts they have permission to read. Posts in private groups, in record-level feeds the user does not have access to, or in chatter posts shared only with a specific user are excluded from that user view of trending. This means two users in the same org can see slightly different trending lists depending on which groups and records they belong to. Org admins see the full unfiltered list. Topic moderation and Chatter influence permissions also affect trending, since hidden topics and muted topics drop out of the list entirely for the users they apply to.
Cultural patterns that make trending useful
Trending Topics only pays off in orgs that have adopted a consistent hashtag culture inside Chatter. If half the org tags posts with one hashtag and the other half does not tag at all, the trending list misses most of the signal. Orgs that get value from trending almost always pair it with a short list of canonical hashtags published as part of the company communications playbook, plus a small topic moderation team that merges spelling variants and retires stale ones. Without that discipline, trending devolves into a list of one-off hashtags that each surfaced a handful of posts. Treat hashtag hygiene as part of the org change-management plan, not as something users will figure out on their own.
Where Trending Topics sits in the current Chatter roadmap
Chatter Trending Topics is still in the product, but Chatter itself has been deprioritized in favor of Slack as the primary communication surface for newer customers. Salesforce has not retired the feature, and existing orgs can still rely on it, but new investment goes into Slack-side equivalents like channel highlights and Trending in Slack search. If you are designing a fresh internal communication strategy on Salesforce today, evaluate whether the audience and the use case still belongs in Chatter or whether it should move to Slack. For orgs that already have Chatter at scale and a working hashtag culture, Trending Topics remains a low-effort awareness tool with no migration pressure.
Setting up Trending Topics so it is actually useful
Trending Topics turns on automatically when Chatter is enabled, so the configuration work is less about wiring up the feature and more about creating the conditions for it to be useful. The work splits into three threads: making sure the right people can post and read across the org, publishing a canonical hashtag list, and setting up a small topic moderation routine to keep variants in check. None of these are technical changes in the strict sense; they are operational decisions that determine whether the trending board fills with signal or with noise. Skip any one of them and the feature still loads but stops being interesting after the first week. Treat the setup work as a quarterly operating cadence rather than a one-time enable.
- Confirm Chatter and Topics are enabled
Open Setup, search Chatter Settings, and confirm Chatter is enabled at the org level. Then search Topics in Setup and confirm Topics for Objects is enabled at least on the Feed Item object so that hashtags inside posts get attached to Topic records. Without Topics enabled, hashtags display as plain text and Trending Topics has nothing to rank. Most orgs that turned on Chatter at launch already have this in place. Orgs on newer signups may need to flip Topics on explicitly before the trending card starts populating.
- Publish a canonical hashtag list
Pick a small set of hashtags that the org cares about, write them down in a place every employee can find (the internal wiki, the company handbook, the new-hire onboarding deck), and explain when to use each one. Common categories are launches, incidents, quarterly results, and policy changes. The published list is the only thing that keeps the trending board from filling up with one-off variants. Refresh the list every quarter, retire hashtags that no longer get used, and add new ones for upcoming initiatives.
- Assign topic moderators and write a merge SLA
Designate a small team (Comms, HR, or Internal Operations) as topic moderators with the Modify Topics permission. Their job is to merge spelling variants of the same hashtag into a single canonical Topic, retire stale topics, and hide off-topic or low-quality topics from the trending board. Write a one-line SLA for the team, for example merge variants within one business day so the trending board does not double-count active conversations. Track the moderation queue in a Chatter group so the work is visible and handovers are clean.
- Add a Trending Topics card to high-traffic Lightning pages
The trending card is already on the Chatter overview page, but most employees do not start their day there. Use the Lightning App Builder to add the Chatter Trending Topics standard component to the home page, the relevant app overview pages, and any communication app pages your org has built. This puts the card in front of users without forcing them to go to Chatter directly. Set the component to a compact display so it does not push primary work content below the fold.
- Trending Topics is per-user and respects feed visibility. Two users in the same org can see different lists depending on group membership and record-level access.
- Spelling variants of the same hashtag count as different topics until a moderator merges them. Without active moderation, the trending board fills with near-duplicates.
- The trending decay window is around a few days. A topic that was hot last week disappears from the list, even if total post counts are still high.
- Chatter Classic is end-of-life, but Trending Topics still works there. If your org runs Classic for any reason, the card is in a different location and may look out of date.
- If your communication strategy uses Slack as the primary surface, the Salesforce trending board misses everything that happens in Slack channels. Treat it as one signal, not the only one.
Trust & references
Straight from the source - Salesforce's reference material on Trending Topics.
- Topics OverviewSalesforce Help
- Set Up TopicsSalesforce Help
- Chatter OverviewSalesforce Help
About the Author
Dipojjal Chakrabarti is a B2C Solution Architect with 29 Salesforce certifications and over 13 years in the Salesforce ecosystem. He runs salesforcedictionary.com to help admins, developers, architects, and cert/interview candidates sharpen their fundamentals. More about Dipojjal.
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