Document Ads

A Document ad is a LinkedIn Sponsored Content format that lets people read a file inside the feed. LinkedIn's ad guide lists the accepted files as PDF, DOCX, or PPTX, up to 100 MB and 300 pages, and describes the format as a way to preview guides, ebooks, or whitepapers without a landing page. You choose Document as the ad format in Campaign Manager, upload the file, write the introductory text and headline, and add a call-to-action. The reader swipes or scrolls through the first pages directly in the feed, so the content itself works as the ad. Set the cover page as carefully as an ad image, because it is the first thing the reader sees.

The main option is gating. LinkedIn's guide says you can place the document behind a Lead Gen Form, so a reader sees a few preview pages and then fills in the form to continue. Lead Gen Forms pre-fill from LinkedIn profiles, and the guide lists up to 12 form fields and 3 custom questions with CRM integration and CSV download. If you do not gate it, the document is free to read and you rely on the call-to-action to pull people toward a page. Choosing where the gate sits is the main design decision. Show enough that the reader is convinced, and not so much that the form feels pointless. A form with only the fields you need tends to be completed more often than one that asks for everything.

Document ads work with the usual LinkedIn targeting and with the objectives that support them. They suit content offers that would otherwise sit behind a landing page, like checklists, benchmark reports, and templates. Compared with a Single Image ad, the document lets you prove value before asking for anything. Compared with a Video ad, it lets the reader move at their own speed. Compared with a Conversation ad, it does not interrupt anyone's inbox. Because it is a feed format, creative testing matters: the same document with a different cover page or introductory line can perform very differently, so change one thing at a time. Pair the document with a clear audience description in the intro text, so the right readers recognize themselves.

The first mistake is gating too early. If the form appears on page one, readers who have not yet seen any value tend to leave. The second is uploading a dense whitepaper written for a desktop screen, since many members see the feed on a phone. Short pages with large text and one idea each read better in the feed. A third mistake is a weak cover page. It acts as the thumbnail and decides whether anyone opens the file. The fourth is treating form fills as the end result, when the real question is how many of those leads are the people you wanted. Avoid pasting a long article into slides, since dense paragraphs are hard to read on a phone.

Build an 8 to 12 page document where every page makes one point and the best insight appears by page three. Put the gate after that insight, not before it. Write an introductory line that names the audience and the problem. Run it against a defined audience for two weeks. Look at the form completion rate and the cost per lead, then open the leads and check whether they match your target titles. If completion is low, move the gate later. If lead quality is low, tighten the audience. Re-use your best-performing document by cutting a shorter version for a second test. Keep the original design file, because updating the numbers each quarter is easier than rebuilding the document.