LinkedIn Ads campaign types explained: which to use for B2B SaaS

LinkedIn Campaign Manager offers five ad formats: Sponsored Content (image, carousel, video ads in the feed), Message Ads (InMail to targeted inboxes), Dynamic Ads (personalised ads using profile data), Text Ads (small sidebar ads), and Lead Gen Forms (forms that attach to Sponsored Content). For B2B SaaS founders with limited budgets and no prior LinkedIn Ads experience, the right starting point is almost always Sponsored Content with a Lead Gen Form attached.

What is Sponsored Content and when should you use it?

Sponsored Content appears in the LinkedIn feed as native posts — single image, carousel, or video. They look like regular LinkedIn posts from a company page and reach users while they're scrolling their feed. Single image ads are the simplest format: one image, headline (70 characters), and introductory text (150 characters shown before "see more"). Carousels work well for showing multiple use cases or a step-by-step process. Video Sponsored Content performs strongly for product demonstrations and founder story content. Use Sponsored Content for: brand awareness at the ICP level, content amplification, and as the container for Lead Gen Forms.

What are LinkedIn Lead Gen Forms and why do they outperform landing pages?

Lead Gen Forms attach to Sponsored Content ads. When a user clicks the CTA, instead of going to a landing page, a form opens inside LinkedIn — pre-filled with the user's professional profile data (name, email, job title, company name, company size). The user reviews and submits in two taps. No typing required. Conversion rates for Lead Gen Forms are typically 3–5x higher than equivalent landing page campaigns because the friction is dramatically lower. The trade-off: leads from Lead Gen Forms are lower intent than leads who navigate to your website — they converted easily, which also means they may be less committed. Follow up quickly.

What are Message Ads and are they worth using?

Message Ads are direct messages sent to LinkedIn inboxes of targeted users. They have high visibility (the notification draws attention) and can feel personal. The problems: open rates have declined significantly as LinkedIn users become fatigued with promotional InMail. They're charged per send (not per click), so you pay even for recipients who don't open. And LinkedIn limits how often the same user receives Message Ads. For B2B SaaS, Message Ads can work for hyper-targeted campaigns (under 5,000 recipients) with genuinely personalised copy — they fail as mass-send promotional vehicles.

What are Text Ads and Dynamic Ads?

Text Ads are small sidebar ads with a headline, description, and small image. They have very low CTR (typically 0.02–0.05%) and are useful primarily for brand reinforcement at low cost — getting your name in front of your target audience repeatedly without spending much. Dynamic Ads personalise automatically using the user's LinkedIn profile — "Hi [First Name], [Company] is looking for teams like yours." Open rates are reasonable but the personalisation can feel intrusive. Neither format is the right primary format for B2B SaaS lead generation — use Sponsored Content with Lead Gen Forms for leads and reserve Text Ads for brand retargeting at minimal cost.