LinkedIn Ad Formats Guide: Single Image vs Document vs Video (2026)

LinkedIn has many formats. Most are legacy junk. In this "Mega-Authority" guide, we rank them by Performance per Dollar.

The Tier List:

1. S-Tier: Document Ads.
2. A-Tier: Single Image Ads.
3. B-Tier: Text Ads (Cheap).
4. C-Tier: Video Ads.
5. D-Tier: Carousel Ads.

Part 1: S-Tier - Document Ads

This format allows users to read a PDF inside the feed without leaving. They swipe pages like a carousel. The Magic: To unlock the full PDF or download it, you can gate it with a Lead Form mid-stream.

• Example: Read pages 1-3 for free. Click "Unlock" to read pages 4-10 (Auto-fills form).
• Stats: These currently have the lowest CPL on the platform (~$30).

Part 2: A-Tier - Single Image Ads

The workhorse.

• Aspect Ratio: 1.91:1 (Landscape) or 1:1 (Square). Note: Vertical (4:5) is now supported - use it for mobile real estate!
• Strategy: "Boring" B2B images fail. Use bright colors, faces, or clear charts.
• Text: 150 characters intro. Keep it punchy.

Part 3: C-Tier - Video Ads

Video is expensive on LinkedIn. CPV (Cost Per View) can be $0.10 - $0.50 (vs $0.01 on Meta). Use Case: Only use video for Retargeting or Brand Awareness where you need to tell a complex story. For Direct Response, Images/Documents usually beat Video on CPL.

Part 4: D-Tier - Carousel Ads

On Facebook, Carousels tell a story. On LinkedIn, the UI for carousels is clunky and click-through rates are surprisingly low. Document Ads have largely replaced the utility of Carousels for storytelling.

Part 5: Message Ads (Conversation Ads)

These live in the inbox.

• Pros: 100% Share of Voice. No feed distraction.
• Cons: Expensive ($0.50 - $1.00 per send). Low daily inventory.
• Strategy: Use for "VIP Invites" (Event invitations) or "Bottom Funnel" offers. Do not use for "Read my blog."

Part 6: Summary & Checklist

Your Action Plan:

1. Convert your whitepaper into a PDF Document Ad.
2. Gate it after Page 3.
3. Launch a standard Single Image campaign for scaling.
4. Avoid boosting posts just because they are there.

Format dictates function.

Text Ads and Spotlight Ads — The Subconscious Branding Layer

Text Ads and Spotlight Ads appear in the right-rail sidebar of LinkedIn's desktop interface. Nobody clicks them. That's not the point.

The economics: Right-rail CPMs are $5–$10 versus $80+ for newsfeed Sponsored Content. The click-through rate is near-zero, but the impression cost is near-zero as well. At scale, you can generate thousands of brand impressions within your exact target audience for pennies per person.

The strategy — Halo Effect: Run these ads to the exact same audience as your main Sponsored Content campaigns. When a VP of Marketing sees your Sponsored Content in their feed, your logo is simultaneously visible in the sidebar. When your SDR calls them three days later, the prospect thinks: "I know this company. I've seen them everywhere." The frequency booster effect converts cold outreach into warm recognition.

Spotlight Ads — Personalization at Scale: Spotlight Ads dynamically pull the viewer's profile photo into the ad creative. A Finance Director named Sarah sees: [Sarah's LinkedIn headshot] + your logo + "Sarah, ready to eliminate manual reconciliation?" The biological response to seeing your own face in an unexpected context generates a stop-and-look effect that no static image can replicate. Particularly effective for recruiting ("Join our team, Sarah") and professional education offers.

Video Ads — The B2B Specs and Silent-First Framework

Technical specs that matter:

• Aspect ratio: Square (1:1) only. It takes the most screen real estate on both desktop and mobile. Landscape (16:9) is small on mobile; vertical (9:16) gets cropped on desktop. Square is the only format that performs consistently across placements.
• Length: 15–30 seconds for cold audiences. 60 seconds max for webinar teasers. Anything longer requires a level of existing interest that cold audiences haven't established.
• Format: MP4, AAC audio, 30 FPS.

The silent-first rule: LinkedIn videos autoplay with sound off. Burned-in subtitles are mandatory — not LinkedIn's auto-captions (which are frequently inaccurate), but subtitles baked into the video file itself. Large typography overlays work equally well and require less production time.

The first 3 seconds (the B2B hook): You don't need a TikTok dance. You need a value promise.

• Bad hook: 5-second animated logo intro → 90% scroll-past rate before your message begins
• Good hook: "Stop paying Google for clicks that never convert." (Direct, specific, problem-named)
• Good hook: "Here is the exact framework we used to close $1M in 6 months." (Specific number, credible claim, implied payoff)

Content types that consistently outperform:

1. Talking head with cuts: CEO or founder speaking directly to camera, with B-roll inserts every 3–5 seconds to maintain visual interest
2. Kinetic typography: Text moving on screen, fast-paced, minimal production cost, highly effective for B2B audiences who process information visually
3. Demo screencasts: Show the software UI, speed it up (2×), add a voiceover — shows the product doing the thing you promised in the hook