LinkedIn Ad Formats Explained: Sponsored Content, InMail, and Text Ads

LinkedIn offers more ad formats than most marketers realize. Each format serves a distinct purpose, reaches users in different contexts, and performs differently depending on your objective. Choosing the wrong format is one of the fastest ways to waste budget on the platform.

This guide breaks down every LinkedIn ad format available in 2025, explains where each appears, and provides clear guidance on when to use each one based on real campaign performance data.

The LinkedIn Ad Format Landscape

LinkedIn organizes its ad formats into four broad categories: Sponsored Content (appears in the feed), Sponsored Messaging (delivered to the inbox), Dynamic Ads (personalized sidebar ads), and Text Ads (simple sidebar placements). Within these categories, there are specific format variations that behave quite differently.

Sponsored Content: The Feed Workhorse

Sponsored Content appears directly in the LinkedIn feed, blending with organic posts. It is by far the most used and most versatile format on the platform. Within Sponsored Content, you have several sub-formats:

Single Image Ads

The most straightforward format. One image, a headline, introductory text, and a CTA button. This is the default choice for most campaigns and the format that consistently delivers the most predictable results.

Best for: Lead generation, traffic campaigns, event registrations

Specs: 1200x627 pixels recommended, up to 150 characters for the headline, 600 characters for introductory text

Performance benchmarks: Average CTR of 0.44%-0.65%, CPL of INR 1,200-3,500 for Indian B2B campaigns

Carousel Ads

Multiple cards (2-10) that users swipe through, each with its own image, headline, and destination URL. Carousel ads consistently outperform single image ads on engagement metrics because they invite interaction.

Best for: Product showcases, multi-feature highlights, customer story sequences, step-by-step educational content

Performance benchmarks: Average CTR 15-30% higher than single image. Engagement rates are typically 2x higher.

The key to effective carousels is treating each card as a compelling standalone message while also creating a logical narrative flow across cards. Do not just slice one long image into multiple cards.

Video Ads

Native video that autoplays (muted) in the feed. Video ads are powerful for brand awareness and education but require more production investment.

Best for: Brand awareness, product demos, customer testimonials, thought leadership

Specs: 16:9 or 1:1 aspect ratio, 3 seconds to 30 minutes (recommended: 15-60 seconds), MP4 format, subtitles mandatory since most users watch muted

Performance benchmarks: View rates (2+ seconds) of 25-35%, completion rates of 15-25% for 30-second videos

In the Indian market, we have observed that videos featuring real people (founders, customers, team members) outperform animated explainers by 40-60% on engagement. Authenticity wins on LinkedIn.

Document Ads

A relatively newer format that allows you to share PDFs, PowerPoints, and Word documents natively in the feed. Users can flip through the document without leaving LinkedIn.

Best for: Whitepapers, case studies, industry reports, frameworks and templates

Performance benchmarks: Engagement rates are 2-3x higher than single image ads because the interactive nature keeps users in the ad longer

Document ads are particularly effective for content marketing strategies where your goal is to demonstrate expertise. They also build excellent retargeting audiences since you can retarget users who viewed a certain percentage of your document.

Event Ads

Promotes LinkedIn Events directly in the feed with a one-click registration. If you are running webinars, workshops, or industry meetups, this format eliminates friction.

Best for: Webinar registrations, virtual events, conference promotions

Performance benchmarks: Registration rates are 20-40% higher than landing page-based event promotion due to the one-click experience

Sponsored Messaging: The Inbox Play

Sponsored Messaging delivers ads directly to a user's LinkedIn inbox. There are two sub-formats:

Message Ads (Formerly Sponsored InMail)

A direct message from a designated sender (a real person's LinkedIn profile) to the target user. It includes a subject line, message body, a CTA button, and optionally a banner image.

Best for: High-value offers (demos, consultations, exclusive invitations), account-based marketing, executive outreach

Key constraint: LinkedIn limits each user to receiving one Sponsored Message every 45 days from any advertiser. This severely limits scale but ensures high open rates.

Performance benchmarks: Open rates of 40-55%, CTR of 3-5%, CPL of INR 2,000-5,000

The sender matters enormously. Messages from a VP of Sales convert better than messages from a company page. In India, messages from a recognizable founder or industry figure can boost open rates by 15-20%.

Conversation Ads

An interactive messaging format that presents multiple CTA buttons, allowing the recipient to choose their own path through a branching conversation. Think of it as a chatbot experience within the LinkedIn inbox.

Best for: Lead qualification (self-segmentation), multiple offer presentation, complex products with different use cases

Performance benchmarks: Engagement rates 25-40% higher than standard Message Ads because users can interact rather than just read

Conversation Ads work exceptionally well when you have multiple value propositions for different personas. Instead of guessing which offer will resonate, you let the user self-select.

Dynamic Ads: Personalized Sidebar

Dynamic Ads appear in the right sidebar of the LinkedIn desktop experience (they are not shown on mobile). They automatically personalize using the viewer's profile data, including their photo, name, and company.

Follower Ads

Encourages users to follow your LinkedIn company page. Uses the viewer's profile photo alongside your company logo for a personalized feel.

Best for: Building your organic LinkedIn audience, brand awareness

Spotlight Ads

Drives traffic to a specific landing page or offer. Similar to Follower Ads in format but with a customizable CTA.

Best for: Promoting specific offers, content downloads, or product pages to desktop users

Content Ads

Promotes content downloads in the sidebar. Less common but useful for gated content strategies.

Dynamic Ads are generally less effective than Sponsored Content because they only reach desktop users (roughly 40% of LinkedIn traffic in India). However, they are significantly cheaper, making them useful as a supplementary format.

Text Ads: The Budget Option

Text Ads are simple, small-format ads that appear in the sidebar and at the top of the LinkedIn feed on desktop. They consist of a small image (100x100 pixels), a headline, and a brief description.

Best for: Supplementary brand awareness on a limited budget, testing messaging before investing in larger formats

Performance benchmarks: CTR of 0.02%-0.05%, CPC of INR 60-150

Text Ads are the cheapest format on LinkedIn and the lowest in performance. They work best as a low-cost always-on presence rather than a primary lead generation channel. Think of them as digital billboards for your brand.

Choosing the Right Format: A Decision Framework

Here is a practical framework for format selection based on your campaign objective:

Multi-Format Campaign Strategy

The most effective LinkedIn advertisers do not rely on a single format. They build multi-format campaigns that guide prospects through the buying journey:

1. Awareness: Video Ads and Document Ads to educate and build familiarity
2. Consideration: Carousel Ads and Single Image Ads with case studies and comparison content
3. Conversion: Lead Gen Form campaigns and Message Ads with direct offers
4. Retention: Event Ads for customer webinars and community building

This full-funnel approach typically reduces CPL by 30-40% compared to running only conversion-focused campaigns, because you are nurturing prospects before asking for their information.

Format Testing Best Practices

When testing formats, keep these principles in mind:

• Test one variable at a time: if you change the format, keep the messaging consistent
• Allocate at least INR 15,000-20,000 per format test to gather statistically meaningful data
• Run tests for a minimum of 14 days to account for LinkedIn's weekly usage patterns
• Compare formats on cost-per-qualified-lead, not just CTR or CPL

Final Thoughts

The right LinkedIn ad format is the one that matches your specific objective, audience behaviour, and budget constraints. There is no universally best format, only the best format for your situation.

At AnantaSutra, we design multi-format LinkedIn campaigns tailored to Indian B2B audiences. Our approach combines data-driven format selection with creative strategy to ensure every rupee of your ad spend works toward pipeline growth. Reach out to learn how we can optimize your LinkedIn advertising mix.