Tags are the YouTube ranking factor creators worry about most and that matters least. Years ago they did real work; today they are a minor signal that YouTube has openly downplayed, overtaken by your title, thumbnail, description and what viewers actually do. The honest advice is the unglamorous kind: add a few sensible ones, spend four minutes, and move on to something that matters more.
This is worth saying plainly, because the internet is full of tag advice that has not been updated in five years, and whole tools sell tag optimisation as if it were 2016. Chasing the perfect tag list is effort spent on the wrong half of the job, while the title and thumbnail that actually decide the video's fate get less attention than the tags.
What tags still do
Not nothing, just not much. Tags help YouTube in a few small ways: catching common misspellings of your topic, clarifying an ambiguous term, and giving a little context for a niche subject the title cannot fully spell out. Genuinely useful in a handful of cases, marginal in most.
So add a few: your primary keyword, a couple of close variations, one or two broader terms for the topic. Five to eight good tags is plenty. The first tag carries the most weight, so make it your main keyword. Then stop, because the tenth tag does almost nothing the first three did not.
Where the worry should go instead
The four minutes you save by not agonising over tags is better spent where the impact is. A sharper title, a clearer thumbnail, a stronger first line of the description, a better hook: any one of those moves more than a perfect tag list ever could. The packaging order of importance is roughly thumbnail, title, description, then everything else, and tags are firmly in the everything else.
This is the same logic the whole Package phase runs on: thumbnails get three steps and tags get one with a disclaimer, because that asymmetry matches where the clicks actually come from. Spend your attention in proportion to what it changes.
What not to do
Do not stuff tags with popular but irrelevant terms to ride someone else's traffic; YouTube ignores it at best and reads it as a spam signal at worst. Do not copy a competitor's entire tag list. And do not buy into a tool's promise that the right tags will transform your reach, because the lever that transforms reach is the part viewers see, not the part hidden in the upload settings.
Where Chewbr fits
Tags (don't overthink it) is step 27 of the 47, and even its name carries the message. It sits deliberately after the heavyweight packaging steps, a quick four-minute task on the way to the things that genuinely move first-day views.
Keep reading
With tags done quickly, set up end screens and cards, which actually do drive the next view. The work that matters more lives in the thumbnail and the title.