We know that a conversion refers to an action you want a user to take — a booking, an enquiry, a phone call. But conversions in paid media come in different forms, and as PPC has evolved, so has the way we think about and measure them. This is especially true in travel, where the path from first click to completed booking can stretch across weeks or months.
In this post, we’re going to look at the different ways you can define a conversion depending on your PPC campaign — and what that means specifically for tour operators and travel advertisers.
How have conversions changed?
Rather than tracking a single conversion event, we now focus on multiple actions across the user journey — what we call micro-conversions. In travel PPC, this matters more than almost any other sector. A complete booking is the ultimate goal, but that booking is typically preceded by a brochure request, a destination guide download, a time-on-site threshold, or a return visit. These micro-conversions are how we measure whether our campaigns are actually moving people down the funnel.
What we’ve found with tour operator clients is that relying solely on last-click booking conversions significantly undervalues the upper funnel. Someone who books a small-group tour in March may have clicked a Google Ad in November, returned via organic in January, and converted via a remarketing ad in February. Without micro-conversion tracking throughout, you’d only ever see the last touch.
Conversion types by goals
Lead Generation
Lead generation conversions are actions that capture user intent without completing a full transaction — enquiry form submissions, brochure requests, callback requests, or newsletter sign-ups. In travel, this is often the primary PPC conversion goal for tour operators who sell high-value, complex itineraries. Clients often ask us whether they should be optimising for bookings or leads: the honest answer depends on your average booking value and the length of your sales process. If a single booking is worth £3,000+, generating a qualified lead and converting it through your sales team is often far more cost-effective than optimising directly for online checkout.
Purchase Conversions
Purchase conversions are exactly what they sound like — completed transactions. For travel brands with online booking functionality (ferry crossings, activity packages, direct departure bookings), purchase conversion tracking is straightforward. But even here, things get more complex. A PPC ad is often the first point of discovery, not the closing touch. We tend to see a significant number of travel bookings that start with a paid click but convert days or weeks later via a different channel. Data-driven attribution — or at minimum, position-based attribution — gives a far more accurate picture than last-click alone.
Determining the value
Lead Generation Conversion Value
Assigning a value to a lead isn’t always straightforward, but it’s essential if you want to run smart PPC campaigns. The calculation starts with your average booking value and your lead-to-booking conversion rate. If your average tour booking is worth £2,500 and one in five enquiries converts to a booking, each lead is worth approximately £500. That figure tells you how much you can afford to pay per lead while remaining profitable — and it’s the number that should be driving your Target CPA bidding strategy.
A CRM platform like HubSpot can help you track this properly by connecting enquiry source data to actual bookings. In our experience, tour operators who invest in this connection between PPC and CRM almost always find opportunities to reallocate budget more efficiently across campaigns.
Purchase Conversion Value
For purchase conversions, you’re looking at the actual revenue attributed to each ad. In travel, this is where upper-funnel and remarketing budget allocation becomes a critical question. A remarketing ad that drives the final booking click often gets full credit — but without the awareness campaigns that drove that user to your site in the first place, the remarketing pool wouldn’t exist. What we’d always recommend is tracking the full value chain, not just the closing click.
Other things to consider :
How much are you spending on top-of-funnel versus remarketing? If you switch off your awareness campaigns, your remarketing audiences will shrink — and your cost per booking will likely rise over time. In travel, where the consideration period is long and seasonal, maintaining upper-funnel presence through key planning periods (January for summer sun, October/November for ski) is what keeps the pipeline full for lower-funnel campaigns later in the season.
Conversions with No Attributable Source
Some bookings will always appear without a clear source — direct traffic, dark social, word-of-mouth. This is normal, and it doesn’t mean your PPC isn’t contributing. What it does mean is that you should be cautious about over-indexing on hard attribution data alone. A strong brand presence, built partly through paid campaigns, drives conversions that will never show up in your Google Ads dashboard. Factor that into how you evaluate performance — and don’t cut brand or awareness spend purely because the last-click data doesn’t make it look productive.