Google Ads in plain terms
Someone in Manchester searches for "commercial electrician" or "accounting software for sole traders". Above and below the ordinary results, ads appear, labelled as sponsored. Those ads come from Google Ads. Each advertiser has told Google which searches it wants to appear for, what the ad says, which page it leads to and how much it is willing to spend. Google then decides, search by search, which ads to show.
That is the core. Around it sits a system of campaign types, bidding strategies and measurement that you need to understand to make money rather than lose it. Google Ads was previously called Google AdWords. Paid search is also known as PPC (pay per click) or SEA (search engine advertising). Google's own introduction to Google Ads covers the basics from its side.
What Google Ads is for in digital marketing
Within a wider digital marketing mix, Google Ads usually plays one of three roles: capturing demand from people already searching, testing a new service or market before investing in content, and staying visible on searches where organic rankings are still weak. It differs from SEO in timing and economics: ads can appear soon after approval and stop when you stop paying, while organic visibility builds over months and does not vanish with an invoice. Our guide to SEO vs PPC compares them, and what digital marketing covers places both in context.
Where your ads can appear: the campaign types
Google Ads is more than search ads. When you create a campaign, you choose an objective and a campaign type, and the type decides where your ads appear.
| Campaign type | Where ads appear | Typical use |
|---|---|---|
| Search | Google search results | Reaching people actively looking for what you offer |
| Shopping | Product ads with image and price | Online shops with a product feed in Merchant Center |
| Performance Max | Search, YouTube, Display, Discover, Gmail and Maps from one campaign | Advertisers with reliable conversion data and good creative |
| Display | Websites and apps in Google's network | Awareness and remarketing to past visitors |
| Video | YouTube | Brand awareness and product explanation |
| Demand Gen | YouTube, Discover and Gmail | Creating demand among people not yet searching |
| App | Google's channels, focused on your app | Driving app installs and in-app actions |
How the Google Ads auction works
Every time someone searches, Google runs an auction among advertisers whose keywords match. Google's article on Ad Rank names six factors: your bid, the quality of your ad and landing page, minimum thresholds, the competitiveness of the auction, the context of the search (such as location, device and time) and the expected impact of ad assets. The result decides whether your ad shows and where.
Two consequences matter. A relevant ad that points to a useful page can outrank a competitor who bids more. And you usually pay less than your maximum bid, because the price reflects what is needed to beat the advertiser below you. Our guide to Google Ads cost follows that through to your budget.
How a Google Ads account is structured
An account is built in layers. Understand them and you understand where you can steer.
- Account. Holds billing, conversion tracking, users and every campaign. Each account has a customer ID, a unique number used when granting access or contacting support; this is what people mean by a Google Ads CID.
- Campaigns. Each has a type, goal, budget, locations, language and bid strategy. When people ask what a Google Ads campaign is, this is the level they mean.
- Ad groups. Within a Search campaign, sets of related keywords with ads written for them.
- Keywords. The searches your ads can appear for, controlled by match types.
- Ads and assets. Headlines, descriptions and extras such as sitelinks, call buttons and your location.
- Landing pages. Not technically part of Google Ads, yet decisive for results and cost.
Agencies and consultants manage clients' accounts from a manager account that links to yours without taking ownership. Whatever you outsource, keep the account in your company's name. Our step-by-step guide to Google Ads campaign setup shows how to build one properly.
How you pay for Google Ads
You set an average daily budget per campaign, and Google charges for clicks, or in some campaign types impressions or views, within limits it documents. Billing depends on the payment setting available in your country. With automatic payments, Google charges your payment method after costs accrue, either when they reach your payment threshold or on the first day of the month, whichever comes first. The threshold can rise automatically as you advertise; that is the "Google Ads threshold" people search for. With manual payments you add funds in advance.
Keep company and personal spending separate, enter your business details accurately, and ask your accountant how to treat VAT on Google's invoices. If an agency manages the account, its fee comes on top of what Google charges.
Bidding and measurement: what makes it pay
You can set a maximum price per click yourself, or let Google set bids per auction towards a goal: as many conversions as possible, a target cost per acquisition or a target return on ad spend. Automated strategies only work if conversion tracking is accurate, because Google optimises for whatever you tell it counts. Our guide to Google Ads bidding strategies explains the choice.
Without measurement you only know what you spend. With it you know what you earn. Track forms, calls, bookings and sales before launch, link enquiries to actual clients where you can, and judge campaigns on cost per enquiry, cost per client and return on spend rather than clicks. Cookie consent under UK GDPR and PECR means not every conversion is recorded, so treat the figures as a strong indication rather than an exact count.
Terms you will meet early on
Customer Match
Customer Match lets you use your own first-party customer data, such as a list of existing clients, to reach or exclude those people on Google's properties. It is subject to Google's policies and to UK GDPR, so you need a lawful basis for using the data.
Google Ads API
The Google Ads API lets software manage accounts and pull reports programmatically. It matters to large advertisers, agencies and tool builders; most small businesses never need it.
The Google Ads app
Google offers a mobile app for checking performance and making simple changes on the go. It is handy for monitoring, not a substitute for proper account work. Separately, App campaigns are a campaign type for promoting your own app.
Quality Score
A 1 to 10 diagnostic per keyword, reflecting expected click-through rate, ad relevance and landing page experience. It is not an auction input, but the quality it summarises affects position and cost.
When Google Ads fits, and when it does not
Google Ads fits when people actively search for what you offer, when you need visibility quickly, or when you want to test a new service before committing to SEO. It also complements organic search on terms where you do not yet rank. It fits poorly when nobody searches for your product, when margins leave no room to pay for clicks, or when your website does not turn visitors into enquiries. In that case, fix the website and offer first.
Regulated sectors need extra care. All ads must respect the ASA's CAP Code, and professions such as solicitors, dentists and financial firms have their own rules on what they may claim. A Google Ads campaign for a law firm, for example, should be checked against SRA requirements before it runs.
If you would rather hand campaigns to specialists, see how we work as a PPC agency.