In the dynamic landscape of digital advertising, precision is paramount. For businesses operating in South Africa and beyond, understanding the intricacies of each advertising platform is crucial for maximising return on investment. At Syte, we measure sales, not likes, and that ethos extends to every aspect of campaign execution, starting with the technical specifications. While social media is undeniably popular, with countless platforms vying for attention, keeping track of ad media specs can be a challenge. This article serves as a definitive guide to LinkedIn Ad Specs, ensuring your campaigns are not only compliant but also optimised for performance.
LinkedIn stands out as a powerful B2B advertising channel, offering unparalleled targeting capabilities to reach professionals, decision-makers, and specific industries. To truly leverage this platform, however, your creative assets must meet its technical requirements. Non-compliance can lead to rejected ads, wasted resources, and ultimately, missed opportunities for lead generation and sales conversion.
What You Need to Know Before Diving into LinkedIn Paid Ads
Before launching any LinkedIn ad campaign, it's essential to grasp the fundamental requirements for various ad formats. LinkedIn offers a diverse range of advertising options, each designed for specific objectives, from brand awareness to lead generation and direct sales. Understanding the nuances of each format's specifications is the first step towards a successful campaign strategy.
The provided specifications are critical for ensuring your ads display correctly across all devices and screen sizes. Adherence to character limits, image dimensions, and file types prevents common issues like cropped visuals, truncated headlines, or ads failing to load. This attention to detail contributes directly to a better user experience, which in turn can lead to higher engagement rates, improved click-through rates (CTR), and ultimately, a better return on ad spend (ROAS). For Syte, these metrics are the heartbeat of performance marketing.
LinkedIn Ad Format Specifications
LinkedIn’s ad formats cater to different campaign goals. Here's a breakdown of the key specifications you'll need to consider for each:
Sponsored Content (Single Image Ad, Video Ad, Carousel Ad)
Sponsored Content ads appear directly in the LinkedIn feed, blending seamlessly with organic content. This format is highly versatile for various campaign objectives, from driving traffic to a landing page to generating leads directly on LinkedIn.
- Introduction Text (Ad Copy): Maximum 600 characters (including spaces). However, for optimal mobile viewing and to avoid truncation, it is highly recommended to keep this under 150 characters. For single image ads, the original text mentioned 2000 characters, but current best practices and LinkedIn's own guidelines suggest a much shorter copy for better engagement.
- Single Image Ad:
- Aspect Ratio: Recommended 1.91:1 (1200 pixels by 627 pixels), but ratios from 1:1 (square) to 1.91:1 are supported.
- Minimum Resolution: 640 pixels wide by 360 pixels high.
- Maximum File Size: 5MB.
- Supported Types: JPEG, GIF, PNG. Animated GIFs are not supported for single image ads.
- Image Must Be More Than 200 Pixels Wide: If your image width is below 200 pixels, it will appear as a thumbnail on the left side of the post, which is generally not ideal for impact.
- Headline Text: Maximum 200 characters (including spaces). Recommended 70 characters for best performance on most devices.
- Description Text: Maximum 300 characters (including spaces). Note: This description is often only visible on desktop or when the ad is expanded.
- Destination URL: Must be a complete URL, including http:// or https://. Plain URLs within the text are included in the character count. LinkedIn automatically handles tracking redirects for performance measurement.
- Video Ad:
- File Format: MP4.
- Frame Rate: 30 frames per second (fps) or less.
- Aspect Ratio: 16:9 (horizontal) or 1:1 (square). Recommended resolution for 16:9 is 1920x1080px; for 1:1, 1080x1080px.
- Minimum Duration: 3 seconds.
- Maximum Duration: 30 minutes. However, best practice for engagement is 15-30 seconds.
- Maximum File Size: 200MB.
- Video Caption File: Supported formats include SRT.
- Carousel Ad:
- Number of Cards: 2 to 10 cards.
- Image Aspect Ratio: 1:1 (square). Recommended 1080 pixels by 1080 pixels.
- Maximum File Size Per Card: 10MB.
- Supported Types: JPEG, GIF, PNG.
- Headline Text Per Card: Maximum 45 characters (including spaces).
- Destination URL Per Card: Each card can have its own unique URL.
Message Ads (Formerly Sponsored InMail)
Message Ads deliver personalised messages directly to a user's LinkedIn inbox, making them ideal for high-impact lead generation or event promotion. It’s crucial to craft compelling copy within the character limits to drive responses.
- Sender: Must be an individual profile (not a Company Page).
- Subject Line: Maximum 60 characters (including spaces). The original text mentioned 1200 characters, which is inaccurate for current Message Ads. Recommended 30-40 characters for best open rates.
- Message Body Copy: Maximum 1,000 characters (including spaces). Includes an optional image and Call-to-Action (CTA) button.
- Call-to-Action (CTA) Button Text: Maximum 20 characters (including spaces).
- Optional Banner Ad (Lead Gen Forms only):
- Size: 300 pixels by 250 pixels.
- File Type: JPEG, GIF (non-animated), or PNG (no flash).
- Maximum File Size: 40 KB.
Conversation Ads
Conversation Ads allow for an interactive, choose-your-own-path experience in the user's inbox, enabling more nuanced engagement and qualification.
- Sender: Must be an individual profile.
- Message Body Copy: Similar to Message Ads, with options for multiple CTA buttons, each leading to a different follow-up message or landing page.
- Call-to-Action (CTA) Button Text: Maximum 20 characters per button.
Dynamic Ads
Dynamic Ads are highly personalised, using LinkedIn profile data to automatically create and serve ads that are relevant to each viewer. These are excellent for follower growth, job applications, or company spotlight.
- Follower Ad / Spotlight Ad:
- Company Logo: Minimum 100 pixels by 100 pixels (square).
- Company Name: Maximum 25 characters (including spaces).
- Ad Headline: Maximum 50 characters (including spaces). Appears below the images.
- Ad Description (Optional): Maximum 70 characters (including spaces). Appears above the images.
- CTA Button: "Visit company", "Visit careers", "Follow", etc.
- Background Image (Spotlight Ads only): Recommended 300 pixels by 250 pixels (optional).
Text Ads
LinkedIn Text Ads are simple, cost-effective, and appear on the right rail or top of the page on desktop. They are best for driving high-volume traffic to a specific landing page.
- Headline: Maximum 25 characters (including spaces).
- Description: Maximum 75 characters (including spaces).
- Optional Small Image: 50 pixels by 50 pixels.
- Available in a variety of sizes: 300 pixels by 250 pixels, 17 pixels by 700 pixels, 160 pixels by 600 pixels, 728 pixels by 90 pixels, and 496 pixels by 80 pixels. These refer to the overall ad unit sizes where the text and image would appear.
Display Ads
LinkedIn Display Ads are standard banner ads that appear on LinkedIn pages, typically sold programmatically or through direct reservations. These are often used for broader brand awareness campaigns.
- Standard Image Sizes: 300 pixels by 250 pixels (Medium Rectangle), 728 pixels by 90 pixels (Leaderboard), 160 pixels by 600 pixels (Wide Skyscraper).
- File Type: HTML5 (must be third-party served), GIF, JPG, PNG.
- Maximum File Size:
- HTML5: 200 KB.
- Other (GIF, JPG, PNG): 40 KB.
- Animation Limit: 15 seconds for video-quality autoplay; 30 seconds for other animations.
Optimising for the South African Market
While the technical specifications remain universal, the content strategy for the South African market requires a nuanced approach. Our local context, characterised by diverse demographics, connectivity variations, and unique business challenges, means that an ad that performs well in London might not resonate equally in Johannesburg.
Consider the bandwidth limitations and data costs for some users. Opting for shorter video ads, highly compressed images, and concise ad copy can improve load times and reduce data consumption, making your ads more accessible and user-friendly across different regions and network qualities in South Africa. Furthermore, tailoring your ad creative and messaging to reflect local business culture, current events, or specific industry trends can significantly increase engagement and conversion rates. For example, a CTA that promises a "free strategy session" might resonate more than a generic "learn more" button, particularly when targeting SMEs in a competitive market.
Knowing these specifications before you post will not only help you deploy the most optimised ads but will also streamline your campaign workflow, reducing approval delays and ensuring your budget is spent effectively. This precision is fundamental to achieving high performance metrics like a low Cost Per Lead (CPL) or a strong ROAS.
The Syte Take
At Syte, our focus is squarely on measurable results. Adhering to LinkedIn's specific ad requirements is not merely a box-ticking exercise; it's a foundational element of performance marketing. By ensuring every creative asset is perfectly aligned with the platform's technical demands, we minimise creative rejections, maximise ad delivery, and enhance the overall user experience, all of which contribute directly to better campaign outcomes – higher conversion rates, improved CPL, and ultimately, increased sales for our clients.
In a competitive digital landscape, every detail counts. A poorly formatted ad, despite brilliant copy or an innovative offer, can fail to perform due to technical oversight. Our approach integrates these specifications into a holistic strategy that accounts for targeting, messaging, and measurement, ensuring that your LinkedIn advertising budget in South Africa works as hard as it possibly can to deliver tangible business growth.
