How an ad works
The ad is the visible end of everything else. Targeting decides who might see it, bidding decides whether it wins a place, and the ad itself is what actually appears on the screen: a headline and two lines of text in search results, an image or video in a feed, a product tile with a price in Shopping.
How much of it you write depends on the format. A responsive search ad takes a pool of headlines and descriptions from you and assembles combinations itself, so you are supplying ingredients rather than a finished ad. Shopping ads are generated from your product feed, so the feed is the copy. Meta ads are closer to traditional creative: one image or video, primary text, a headline and a destination, sitting inside an ad set. Every ad carries a final URL and every ad goes through policy review before it can serve.
Why the ad matters
It is the only part of an advertising account a customer ever meets. Structure, bids and audiences are internal plumbing; the ad is the promise. Two advertisers with identical budgets and identical targeting will get different results purely on what their ads say.
There is a mechanical reward as well as a persuasive one. Expected click-through rate is one of the inputs to Ad Rank, so an ad people want to click can win a better position at a lower price than a duller ad backed by a bigger bid. Copy is one of the few places where thinking harder genuinely costs less money.
Common mistakes with ads
Writing one ad and leaving it untouched for years is the most common, usually because nothing is obviously broken. The second is filling every headline slot with the same idea in slightly different words, which gives the system nothing to test and produces combinations that repeat themselves.
The third is the mismatch: an ad promising same-day service or free delivery, and a landing page that mentions neither. That gap shows up as clicks that bounce, and it is paid for every time. Disapprovals are the quiet fourth — an ad rejected on policy simply stops serving, and nobody notices until the enquiries dry up.
How to act on it
Write to the search, not about yourself. Lead with what the person asked for, then the thing that makes you the right answer — the area you cover, how quickly you respond, what is included, what happens next. Keep the landing page saying the same thing in the same words.
Give each ad group genuinely different headlines rather than variations on one, and let a new ad gather enough data before judging it. Check for disapprovals weekly. And remember that most traffic in Nepal arrives on a phone, where the first headline and the first line of text are often all anyone reads before deciding.