Google Ads Negative Keywords: Stop Paying For Junk Clicks

Negative keywords stop your Google Ads from showing on searches you do not want, so you stop paying for clicks from people who were never going to hire you. You find them by reading your search terms report weekly, adding the junk phrases as negatives, and starting every campaign with a short starter list. Done right, it is the cheapest fix in paid search.

We audit a lot of local service ad accounts. The most common waste is not the bids or the ads. It is the search terms report nobody opened. We see jobs, free, DIY, training and competitor searches eating budget while the owner wonders why leads are expensive.

Key points

• Open the search terms report every week for the first month, then every two weeks.
• Start with a starter list of obvious junk: jobs, free, DIY, how to, cheap, salary, course.
• Match types work differently for negatives. A negative does not match close variants or plurals, so add them.
• Do not block words your buyers use. Check before you add.
• Use shared lists and account level negatives so one fix applies everywhere.
• Negative keywords save money, but they do not fix a weak landing page or a bad offer.

How Junk Clicks Happen

You bid on "roof repair." Google decides what counts as close enough. The system shows your ad to people who typed "roof repair jobs," "how to repair a roof leak yourself," "roof repair training," and "free roof repair for seniors." Each of those can trigger a click. Each click costs money.

Broad match and phrase match widen the net on purpose. Smart bidding helps with the value of clicks, but it does not know that a person searching "plumber salary" wants a job, not a plumber. Negative keywords are how you tell it.

Step 1. Read The Search Terms Report

In Google Ads, open Campaigns, then Insights and reports, then Search terms. This shows the actual phrases people typed that triggered your ads.

Sort by cost, and look at the top 50. For each one ask a simple question: would I want this person to call me?

Write down your decisions. Over a month you will see patterns, and those patterns become your master list.

Step 2. Start With A Starter List

You do not have to wait to learn. Add a base list before you spend a dollar, and adjust for your trade. Common starters:

• jobs, job, hiring, career, careers, salary, employment, apprentice
• free, diy, "do it yourself," "how to," tutorial, youtube, video
• course, class, school, training, certification, degree
• used, wholesale, parts, supplies, "for sale" (unless you sell these)
• reviews, complaints, lawsuit (only if they are off topic for you)
• images, pictures, pdf, template

Adjust before you paste. For a mobile mechanic, "parts" might be fine because a customer might search for the part and the install. For a locksmith, "key" is not junk. Read each word with your business in mind.

Step 3. Understand Match Types For Negatives

This is where owners get burned. Negative keywords do not behave like regular keywords.

Two details that matter.

• Negatives do not expand to close variants. Google says negative keywords do not match close variants, such as plurals and misspellings. If you block "job," also block "jobs." Add the forms you want blocked.
• Broad negatives do not mean what you think. A broad match negative of "free roof" does not block searches that contain only "free." Single words are the safest way to block a whole idea.

Use exact match negatives when you want to block one specific bad phrase but keep similar good ones.

Step 4. Do Not Block Your Buyers

Over blocking is a real risk. A few cases.

• You block "cheap" and lose people who want an affordable fix.
• You block "free" and lose "free estimate" searches that bring jobs.
• You block "near me" by accident, because it was in a long phrase.
• You block your own brand terms in a shared list.

Before adding a negative, search the term in your report to see if it has converted. If it has, leave it. And review your list every quarter, because some negatives that made sense last year may now cut real leads.

Step 5. Use Lists And Account Level Negatives

Do not add the same words campaign by campaign.

• Shared negative keyword lists can be applied across many campaigns. Make one for "jobs and training," one for "DIY and free," one for competitors, and so on.
• Account level negatives apply to the whole account. Google has added them for search campaigns and, more recently, for other campaign types such as Performance Max. Check what your account supports, because the options change.
• Campaign and ad group negatives are for conflicts between your own campaigns. If you have one campaign for "water heater repair" and another for "water heater install," block "install" in the repair one so they do not compete.

Step 6. Keep Your Own Campaigns From Fighting

If two of your campaigns bid on overlapping searches, they can show for the same query and raise your costs. Negatives are how you assign each search to the right place.

A simple scheme:

1. List the services you sell.
2. Give each one its own ad group or campaign.
3. In every group, add the other groups' key words as negatives.
4. Review the search terms report to catch leaks.

The Weekly Routine

This takes 15 minutes.

1. Open the search terms report for the last 7 days, sorted by cost.
2. Mark every term that is junk. Add as a negative at the right level.
3. Look at terms that converted. Consider adding them as exact match keywords.
4. Check for brand new patterns, such as a new competitor name or a news event.
5. Write down what you added and why.

Do it weekly for the first month and then every two weeks. After a few months the junk slows down.

What Negative Keywords Will Not Fix

Be honest about this. Negatives cut waste. They will not rescue:

• A landing page that does not make it obvious how to call or book.
• An offer that is not competitive in your area.
• A phone that goes unanswered. See my notes in powerful converting PPC campaigns and landing page optimization tips.
• Missing conversion tracking. If you do not measure calls and form fills, you cannot tell good clicks from bad ones.

Also pair this with a good form. The ones that cost conversions are in lead forms: the fields that kill conversions.

If you want someone to read your account with you, book a strategy call.

Questions

How many negative keywords should I have?

There is no ideal number. A new account might start with a few dozen and grow into the hundreds as the search terms report teaches you. Quality matters more than count. Each one should block something you have seen or know will waste money.

Do negative keywords match plurals and misspellings?

No. Google says negative keywords do not match close variants. If you want to block "job," add "jobs" and any other forms as well.

How often should I check the search terms report?

Weekly for the first month of a campaign, then every two weeks or monthly. Check right away after changing keywords, budgets or match types.

Can negative keywords hurt my campaign?

Yes, if you block words your buyers actually use. Check that a term did not convert before blocking it, and review your lists on a schedule.