LinkedIn Conversation Ad Character Limits
Conversation ads branch into a 5-button choose-your-own-path. Subject 60 chars (40 visible). First-message body ~300 visible. Each CTA button 25 chars.
LinkedIn Conversation Ads turn a Sponsored Messaging slot into a branching choose-your-own-path experience. The recipient opens an InMail-style message and is presented with up to 5 CTA buttons (25 characters each), each of which routes to a follow-up message with its own body and its own button set. A complete conversation ad is essentially a directed graph of messages and choices — a 3-branch tree with 2 follow-ups per branch needs roughly 7 message nodes plus 11 button labels, all written and reviewed.
Subject line caps at 60 characters with about 40 visible in the inbox preview. The first message body is generous (500 characters with about 300 visible before clamp) — significantly more than Message Ads' 1500-char body that's only used as a one-shot. Each follow-up message has its own 500-char body and its own 5-button CTA set. The primary use-case is ABM-style account engagement where the prospect self-segments by clicking the button that matches their context (industry, role, problem).
Subject: 40 chars visible
Conversation Ads branch into up to 5 CTA buttons (25 chars each). The first-message body shows ~300 visible chars before clamp.
Verified 2026 limits
| Field | Hard max | Visible before truncate | Warn at |
|---|---|---|---|
| Subject line | 60 | 40 | 35 |
| First message | 500 | 300 | 270 |
| CTA button label | 25 | 25 | 20 |
Source: https://www.linkedin.com/help/lms/answer/a423843 · Last verified 2026-04-15.
When Conversation Ads beat Message Ads
Use Conversation Ads when the audience is heterogeneous and self-segmentation matters more than a single dense pitch. Use Message Ads when the offer is one specific call-to-action (book a demo, download a report, register for an event) where branching adds friction without insight.
FAQ
- How many CTA buttons can a Conversation Ad use?
- Up to 5 in the first message and up to 5 per follow-up branch. Each button label caps at 25 characters.
- Are Conversation Ad branches infinite?
- No — LinkedIn caps tree depth at 5 levels and total nodes at 25. Most performant flows stay 2-3 levels deep.
- What is the typical reply rate for Conversation Ads?
- Industry benchmarks land in the 5-15% reply range — roughly 2-3x typical Message Ad reply rate, at the cost of significantly more copy production.