Connecting Google Analytics

Step-by-step setup for connecting Google Analytics 4, Google Tag Manager, and Meta Pixel to your Sailia booking page.

Sailia automatically fires GA4-format e-commerce events from your booking page (see booking tracking events for the full list). This guide walks you through the one-time setup to actually receive those events in Google Analytics 4 via Google Tag Manager.

If you only want to know which events Sailia fires, see the booking tracking reference.

What you’ll need

Before you start, make sure you have:

• A free Google Tag Manager container
• A Google Analytics 4 property
• Your GA4 Measurement ID (looks like G-XXXXXXXXXX)
• Your GTM Container ID (looks like GTM-XXXXXXX)
• Access to your Sailia admin settings
• Optional: a Meta Business Manager account if you also want Facebook/Instagram Pixel tracking

1. Add your GTM container to Sailia

In Sailia, go to Admin → Settings → Business Details and add:

• Your GTM Container ID
• Your Website URL

Sailia uses this to load your GTM container on customer-facing booking pages. It also helps GA4 understand that customers moving from your main website to Sailia are part of the same session.

2. Create your Google tag in GTM

Open Google Tag Manager and select your container.

1. Create a new tag

   Go to Tags → New and choose Google Tag.

2. Set the Tag ID

   Enter your GA4 Measurement ID (G-XXXXXXXXXX).

3. Trigger on all pages

   Set the trigger to All Pages.

4. Name and save

   Name it Google Tag - GA4 and save.

3. Create the GA4 event tag

This tag forwards Sailia’s e-commerce events into GA4.

1. Create a new tag

   Go to Tags → New and choose Google Analytics: GA4 Event (may appear as “Google Analytics event” in newer GTM accounts).

2. Configure the tag

   Field	Value
   Event name	{{Event}}
   Google Tag	The tag you created in step 2
   Send Ecommerce data	Enabled
   Data source	Data Layer

3. Name and save

   Name it Sailia GA4 Ecommerce Events. You’ll attach a trigger next.

4. Create the trigger

1. Create a new trigger

   Go to Triggers → New and choose Custom Event.

2. Set the event name

   Use this regex:

   ^(view_item_list|view_item|add_to_cart|begin_checkout|add_payment_info|purchase)$
   

   Enable Use regex matching, and set it to fire on All Custom Events.

3. Attach to the tag

   Name it Sailia GA4 Ecommerce Events and attach it to the GA4 Event tag from step 3.

5. Test in GTM Preview mode

Before publishing:

1. In GTM, click Preview and open your Sailia booking page.
2. Complete a test booking through to the payment success page.
3. In Tag Assistant, you should see events fire: view_item_list, view_item, begin_checkout, add_payment_info, and finally purchase.
4. Click the purchase event. Under Tags Fired you should see Sailia GA4 Ecommerce Events.
5. Check the Data Layer tab — you should see values like basket_uuid, basket_value, basket_currency, and ecommerce.transaction_id.

If you see those, your tracking is working.

6. Publish your container

Once testing looks correct, click Submit in GTM, add a version name like Add Sailia GA4 booking and purchase tracking, and publish. Events won’t be sent live until the container is published.

7. Mark purchase as a key event in GA4

In GA4, go to Admin → Events. Once GA4 has received a purchase event, find it in the list and enable Mark as key event. This makes purchases count as conversions.

You can also mark add_to_cart, begin_checkout, and add_payment_info as funnel events if you want them in GA4’s funnel exploration reports — but usually only purchase should be the main key event.

8. Confirm in GA4

GA4’s standard reports lag by up to 24 hours. For immediate verification:

• Reports → Realtime — see live events as they fire
• Admin → DebugView — see the full data layer payload for each event

If purchase appears under key events, the integration is live.

What Sailia sends

For the purchase event, Sailia pushes order-level data into GTM and GA4:

{
  "event": "purchase",
  "sailia_event": "booking_completed",
  "basket_uuid": "bas_abc123",
  "basket_value": 395,
  "basket_currency": "GBP",
  "basket_coupon": "SUMMER10",
  "basket_payment_method": "CARD",
  "ecommerce": {
    "transaction_id": "bas_abc123",
    "value": 395,
    "currency": "GBP",
    "tax": 25.88,
    "coupon": "SUMMER10"
  }
}

The integration is order-level — individual line items aren’t sent to GA4. For deeper analysis, use Sailia’s financial exports.

Cross-domain tracking (recommended)

To keep attribution connected between your website and Sailia, configure your domains in GA4:

GA4 → Admin → Data streams → Web stream → Configure tag settings → Configure your domains

Add your main website domain and your Sailia subdomain:

yourwebsite.com
yourbusiness.sailia.com

Don’t include https://. This stops GA4 treating Sailia as a referral and breaking session attribution.

Using the data for other tags

Because Sailia pushes friendly top-level values into the data layer, you can reuse them for other marketing tags.

For example, Google Ads conversion tracking:

Field	Value
Conversion value	{{basket_value}}
Currency	{{basket_currency}}
Transaction ID	{{basket_uuid}}

Or Meta Pixel Purchase:

Field	Value
Value	{{basket_value}}
Currency	{{basket_currency}}

Fire these tags on the same custom event trigger (purchase).

Troubleshooting

Sailia is pushing events, but GA4 isn’t showing them. In GTM Preview, click the purchase event. If you see the data layer payload but no GA4 tag fired, check that:

• The GA4 Event tag exists
• The trigger is a Custom Event trigger
• Regex matching is enabled
• The regex is exactly the string above
• The GA4 Event tag uses {{Event}} as the event name

The tag fires, but GA4 reports are empty. GA4’s standard reports lag. Use Reports → Realtime or Admin → DebugView. Also confirm you’re looking at the same GA4 property as the Measurement ID in GTM.

gtm.init appears as an event in GA4. The GA4 Event tag is firing too broadly. Make sure it only fires on the Sailia custom event trigger, not on “All Pages”, “All Events”, “Initialization”, or “Container Loaded”.

Purchase isn’t a key event option. GA4 can’t mark an event as a key event until it has received that event at least once. Make a test purchase, wait for purchase to appear in GA4, then mark it.

Related guides

Booking tracking events

The full list of events Sailia fires.

Embedding

How to add Sailia to your website.