Straight answer: Hashtags on YouTube barely move the needle for discovery anymore, they help with categorisation more than reach, and the only ones worth your time are 2 or 3 specific, low-competition terms placed in the description, not fifteen generic ones stuffed above your title. Most of what you have read about hashtags “boosting the algorithm” is left over from 2019 and does not reflect how YouTube ranks video today.
Why I stopped obsessing over hashtags in 2021
I ran a YouTube channel for my own content for years, alongside managing video strategy for clients, and for a long stretch I did exactly what every guide told me to do. Fifteen hashtags in the description, three pinned above the title so they showed as clickable tags under the video, a spreadsheet of “trending” hashtags I updated weekly. I tracked the results, not vibes, actual YouTube Studio traffic source data, week on week, for four months across two channels.
The hashtag traffic source never accounted for more than 0.3% of total views on either channel. Not 3%. Zero point three. Meanwhile “browse features” and “suggested videos” were doing 60 to 70% of the heavy lifting, and search was doing another 15 to 20%. That one stat changed how I built video strategy for every client after that, including the small business owners I now work with through hands-on AI and marketing consulting.
I am not saying hashtags do nothing. I am saying the return on the time you spend picking them is nowhere near what the return is on your thumbnail, your first 15 seconds, and your title. If you have an hour to spend on a video before it publishes, spend 50 minutes on those three things and 10 on hashtags. Most creators do it backwards.
What hashtags on YouTube do
YouTube uses hashtags in two visible places: the ones you add in the description (up to 15, though only the first 3 render as clickable tags above your video title), and the ones typed directly into the title itself. Neither functions like a discovery magnet the way hashtags do on TikTok or Instagram. YouTube’s own creator help documentation is clear that hashtags are meant to help viewers find content on a specific topic, not to trigger algorithmic promotion.
What they do:
- Group your video with others using the same tag when someone clicks the hashtag link above the title
- Add minor topical signal that reinforces what your title and description already say
- Let YouTube confirm the video’s subject when your title is ambiguous
What they do not do, no matter what a course selling “hashtag hacks” tells you: they do not boost you into the suggested feed, they do not override thin watch time, and stuffing them does not make YouTube “understand your niche better.” If your retention graph drops off a cliff at the 20-second mark, no hashtag combination fixes that.
The specific hashtags that are worth adding
If you are going to use them (and you should, just not obsessively), here is what earns a spot:
- One branded hashtag, unique to your channel or series, so returning viewers and YouTube itself can group your content together. Mine was #LilachTips for a run of short marketing clips.
- One niche-specific hashtag that describes the exact sub-topic, not the broad category. #SourdoughBaking beats #Baking because there is less competition and the intent match is tighter.
- One format or franchise hashtag if you run a recurring series, like #MondayMarketing or #Q&ASession, so the series builds its own small identity over time.
That is 3, sometimes 4. Not 15. Adding 12 more generic tags like #YouTube #Viral #Trending #SubscribeNow does not add signal, it adds noise, and in a handful of documented cases creators have had videos flagged for tag spam when the hashtag list looked manipulative and bore no relation to the actual content.
The uncomfortable bit nobody selling a course wants to tell you
Here is the part that annoys people: hashtags are one of the lowest-use tasks in your entire YouTube workflow, and a lot of creators cling to them precisely because they are easy. Picking three hashtags takes two minutes and feels like “doing SEO.” Rewriting a title five times, testing two thumbnails, or cutting your intro down from 45 seconds to 8 takes real effort and often means admitting the first version was weak. Hashtags let you feel productive without doing the hard, uncomfortable work of watching your own retention graph and accepting that the first 15 seconds of your last upload lost 40% of viewers.
I have sat with clients who spent three hours a week researching “trending hashtags” for their channel and could not tell me their average view duration off the top of their head. That is the wrong three hours. If you want a useful weekly habit, spend that time repurposing your best-performing video into shorts, a LinkedIn clip, and a blog post instead, using something like the tools covered in my guide to content repurposing tools, which will bring you more new viewers in a month than a year of hashtag tweaking.
Where hashtags matter more: YouTube Shorts
There is one exception worth flagging. On Shorts, hashtags carry slightly more weight because the Shorts feed leans harder on topical and format signals to slot content into the right vertical feed, similar to how TikTok’s For You page works. Even here, though, the effect is modest and short-lived, it might help a Short reach the right early audience in its first few hours, but it will not rescue a Short with a weak hook in the first 2 seconds. I have seen Shorts with zero hashtags outperform hashtag-heavy ones from the same channel by 5 to 10 times the views, purely because the hook was stronger.
For Shorts specifically, I use one hashtag for the topic (#MarketingTips) and one for the format (#Shorts is largely redundant now since YouTube auto-detects vertical video, so I skip it) and leave it there.
What to check instead of your hashtag list
Before you touch hashtags on your next upload, run through this instead:
- Open YouTube Studio, go to Analytics, and check your audience retention graph for your last 3 videos. Where is the steepest drop? That is your real problem to fix.
- Check your click-through rate on impressions. Anything under 4% usually means your thumbnail or title is not doing its job, regardless of hashtags.
- Look at your “traffic source: YouTube search” numbers and see what terms people typed to find you. Put those exact terms in your title and first line of description, that is doing what people wrongly credit hashtags for.
- Only then, spend your last two minutes adding 2 to 4 specific hashtags.
This is the same order of operations I walk small business owners through when they are trying to build a channel alongside everything else they run, and it is a big part of what I cover when working through practical, step-by-step implementation coaching rather than another list of tactics to bolt on.
A quick real example
A client of mine, a small accountancy firm posting explainer videos, came to me convinced their slow growth was a hashtag problem. Their videos had 20-plus hashtags crammed into every description. We stripped it back to 3 specific ones (#SmallBusinessTax, #UKAccounting, #SelfAssessment), then spent the freed-up time rewriting titles to match actual search phrases people typed into YouTube search, and reworking the first 10 seconds of each video to state the exact problem it solved instead of a slow “hi everyone, welcome back” intro. Views per video went from an average of 340 to 1,900 over the following 8 uploads. The hashtag change contributed roughly nothing measurable on its own, the title and hook changes did the actual work.
For the rest of the YouTube questions, see my YouTube guide, which groups every answer by problem.
Frequently asked questions
Do hashtags help YouTube videos rank higher in search?
Not directly. YouTube search ranking is driven mainly by your title, description content, watch time, and how well the video matches search intent, hashtags are a minor topical signal at best and will not compensate for a weak title or poor retention.
How many hashtags should I use on a YouTube video?
Use 2 to 4 specific, relevant hashtags rather than the maximum of 15 YouTube allows, since only the first 3 display as clickable tags anyway and piling on generic ones adds no benefit and can look like spam.
Do hashtags work differently for YouTube Shorts than regular videos?
Yes, slightly, Shorts feed algorithms rely a bit more on topical tags to place content in the right vertical feed, but the effect is still small compared to your hook strength in the first 2 seconds of the Short.
What should I focus on instead of hashtags to grow a YouTube channel?
Focus on your thumbnail and title’s click-through rate, your audience retention in the first 15 seconds, and matching your titles to real search phrases from YouTube Studio data, these three things drive far more growth than any hashtag strategy.
