How to Use AI Description Generator (2026 Guide)

The description is the most under-used field on YouTube. Viewers see the first two lines; search engines read all 5,000 characters; the algorithm uses it to disambiguate topic in the first hours after upload. The AI Description Generator writes a complete 400–500 word description with keywords placed where they count, a chapter template, a call to action and a link block, formatted so you can paste it straight into YouTube Studio.

This guide walks through the anatomy of a description that ranks, what the keyword placement map is telling you, and the parts you should personalise before publishing.

Anatomy of a description that works

Lines 1–2 (visible before "Show more"): the primary keyword and a one-sentence promise of what the viewer gets. Lines 3–6: a two-paragraph summary with the secondary keywords used naturally — this is what Google indexes for video rich results. Then chapters with timestamps (each chapter title is a mini-keyword). Then the call to action and links. Then, at the bottom, three to five hashtags.

The generator produces all of these blocks in order and marks each with a comment you delete before pasting.

The keyword placement map

At the top of the report is a small table: primary keyword, where it appears (line 1, paragraph 1, chapter 2), and density. The target is 2–3 uses of the primary and one use of each secondary across the whole text. If the map shows the primary keyword five or more times, the tool has been given too little topic detail and is repeating itself — add a sentence about what actually happens in the video and re-run.

What to personalise

Replace the chapter timestamps with your real ones (the Timestamp Generator can format them). Swap the generic link block for your actual links. Keep the first two lines exactly as generated unless they misstate what the video is about — they are written for click-through and search intent together.

Tips

• Paste the video title into the input along with three bullet points of what is covered. The more the generator knows about the content, the fewer generic sentences it writes.
• Add the word "affiliate" if you have affiliate links; the generator inserts the disclosure line YouTube and the FTC expect.
• Reuse the two-paragraph summary as your Community post when the video goes live — it is already written for the same audience.

Common mistakes

• Leaving the first line as a greeting — "Hey guys, welcome back" wastes the only line most people read. The generator never does this; do not add it back.
• Keyword stuffing the bottom — A wall of 40 keywords below the links is a classic misleading-metadata trigger and adds nothing.
• Identical descriptions across videos — Boilerplate is fine for the link block, but the top 150 words must be unique per video.

Worked example