Pay-per-click (PPC) is a pricing model: the advertiser pays when a person clicks the ad, not when the ad is shown. The term is also used loosely for the whole discipline of running paid search campaigns. Google Ads and Microsoft Advertising search campaigns are the best-known PPC channels, and LinkedIn, Meta and Reddit offer click-based buying too.
How the price of a click is set
Most PPC platforms run an auction. You set a maximum bid or let an automated strategy set it, and the platform combines that with a quality or relevance estimate to rank ads. What you actually pay is usually less than your maximum, because it depends on what is needed to hold your position against the next advertiser.
That means click prices are not fixed. They change with competition, season, device, location and the quality of your ads and landing pages.
The numbers PPC teams watch
A PPC account is managed through a small set of ratios. Each one answers a different question, and none of them is enough alone.
- Cost per click: what each visit costs.
- Click-through rate: how often people who see the ad click it.
- Conversion rate: how often clicks become a lead, trial or purchase.
- Cost per acquisition: what each conversion costs.
- Return on ad spend: revenue generated per unit of spend.
Cost per acquisition = Cost per click / Conversion rate
Example: $8 CPC / 0.04 = $200 per conversionWhen PPC makes sense for SaaS
PPC is useful when you need demand now, want to test messaging or pricing pages quickly, or need to defend your brand name in search results. It stops the moment you stop paying, so most SaaS companies run it alongside organic search, which is slower to build but keeps working without a per-click cost.
Example
Testing a new segment
Hypothetical company Tallowmint, which makes inventory software for breweries, wants to know whether wineries would buy. Instead of writing a content program first, it runs a small PPC campaign on winery-specific terms to a dedicated landing page and measures demo requests for six weeks before committing to SEO content for the segment.
Common mistakes
Sending every ad to the home page
A click from a specific query deserves a page that answers it. Generic home pages tend to convert worse and drag down landing page experience scores.
Ignoring wasted spend
Without negative keywords and regular search term reviews, budgets drift toward irrelevant queries.
Questions
On a cost-per-click bid, no. Some campaign types and platforms bill on impressions (CPM) or on other actions, so check the billing event for each campaign.
