How to write a YouTube description
Descriptions are widely overrated as a ranking factor and underrated as a context signal. They do not make a bad video rank; they help a good one be understood.
Only the first line or two is visible before someone taps to expand, and most never do. That constraint decides the structure.
This produces a description that works for both the viewer and the system reading it.
Steps
Write the first line for a human
It appears under the title in search and on the watch page. Treat it as a second title rather than as the opening of a paragraph, because that is how it is read.
Describe what the video actually contains
Plain description beats keyword assembly. YouTube reads it for topical context, and a natural sentence provides more of that than a list of terms, which is also unreadable if anyone expands it.
Put links below the visible fold
Anything you want clicked goes after the first two lines but early enough to survive the expand. Links in the first line compete with the description's actual job.
Add timestamps for anything over three minutes
They generate chapters, which improves navigation and gives YouTube more structure to work with. Short-form does not need them and Shorts do not support them.
Generate a draft if you are stuck
The free description generator produces a first pass from the topic. Editing a draft is faster than starting empty, particularly across a batch of videos.
What you end up with
A description whose first line works as a standalone summary, with links and timestamps below it and no keyword stuffing. The first two lines stand alone in search results, links sit below them but above the expand fold, and timestamps generate chapters on anything past three minutes.
Try the free description generatorWhen this isn't the right approach
Do not spend long on descriptions for Shorts. They are barely surfaced, rarely expanded, and the time is better spent on the hook. This guide is mostly about long-form. If you are producing at volume, this is a reasonable place to spend less care. A serviceable description on every video beats a polished one on half of them, because the marginal return here is genuinely small.
Ready to make one?
Generate a description freeFrequently asked
Do YouTube descriptions affect ranking?
Slightly, as topical context rather than as a keyword target. Title, retention and engagement matter far more. A good description will not rescue a video nobody watches to the end.
How long should a description be?
Long enough to describe the video and no longer. Two or three sentences plus links suits most videos. Long descriptions are neither rewarded nor punished; they are mostly unread.
Should I put hashtags in the description?
Three at most, and only genuinely relevant ones. YouTube shows the first three above the title, which makes them visible real estate rather than metadata.
Should I reuse a description template?
For the boilerplate section, yes. For the first two lines, no, because those are the part that is actually read and a template makes every video look identical in search results.
Do descriptions matter for Shorts?
Barely. They are rarely expanded and the format gives them little surface. Spend the time on the opening seconds of the video instead, where it demonstrably changes the outcome. The one exception is a Short you expect to be found through search months later, where the description is doing work the feed never asked of it.
Do descriptions actually affect search?
Modestly, and mostly through the first sentence. YouTube reads the description for context, but title, thumbnail and watch behaviour dominate by a wide margin, so a keyword-dense description will not rescue a video that nothing else recommends. What descriptions do reliably is serve the person who already clicked: links they need, timestamps that let them navigate, and a first line that confirms they are in the right place. Write for that reader and the search benefit follows.