Google Ads conversion tracking setup: A step by step guide from tagging to verification

Setting up Google Ads conversion tracking consists of loading the Google tag on the website, creating a conversion action for each action to measure under Goals, and verifying the setup with Tag Assistant. On websites using GA4, conversions can also be created from GA4 events marked as key events; phone calls and enhanced conversions are additional layers built on this foundation.

This guide explains selecting conversion actions, adding the Google tag to the website, defining conversions through URLs and code, requirements for GA4 imports, the distinction between primary and secondary actions, enhanced conversions, call conversions, and verification steps, using the menu names in Google’s Turkish help documentation.

What is conversion tracking, and why is a campaign blind without it?

Conversion tracking is the measurement system that records valuable actions such as form submissions, calls, or purchases occurring after an advertising interaction in Google Ads. Without this record, the account sees only clicks and impressions; it cannot tell which keyword, advertisement, or campaign brings customers.

Measurement’s second function is to feed the bidding system. Smart Bidding strategies such as Maximize conversions, target cost per acquisition, and target ROAS learn which actions are valuable from conversion data. Google recommends a learning period of 7 to 14 days for these strategies to stabilize and avoiding frequent changes to targets or budgets during this time. If measurement is set up incorrectly, the system learns to multiply the wrong action.

Before setup: Which actions should count as conversions?

Only actions producing real business value or strongly indicating that value are defined as conversions. Counting every click as a conversion inflates reports and steers bidding in the wrong direction. Typical candidates for service businesses and e-commerce websites include:

• Contact form submission: Measured through the thank-you page opened after a successful submission or through the submission event.
• Phone call: Calls exceeding a specified duration from the call button in the advertisement or the number on the website.
• Purchase: A completed payment recorded with the order amount and transaction ID.
• Appointment or quote request: A completed registration in the booking tool.
• Supporting actions: Intent indicators such as tapping the WhatsApp button, adding to cart, or viewing a pricing page; these are generally kept only for observation.

While preparing the list, decide how often each action will be counted. If two forms submitted by the same person represent one lead, select “one”; if each purchase represents separate revenue, select “every.”

How is the Google tag added to the website?

The Google tag (gtag.js) is a single code sending website data to multiple Google products such as Google Ads and Google Analytics, and it must load on every page. Google’s tag setup page recommends that when both Google Ads and Google Analytics are used, the tag should be installed on only one platform and the other product added later as a destination in tag settings. Older global site tags have also been automatically converted to the Google tag.

For Google Ads conversion tracking, the tag can be added in three ways: directly to the website’s head section, through a Google Tag Manager container, or through a content management system plugin. The most common problem on WordPress websites is code pasted manually into theme settings and a plugin loading the same tag a second time. Google emphasizes that websites must not be tagged twice when using tag management plugins, as conversions may otherwise be reported in duplicate.

How is a conversion action created?

A website conversion action is created from Goals > Summary in Google Ads and defined through a URL for page loads or through code for button clicks or variable values. Google’s web conversion setup page describes the flow as follows:

1. Open Summary in the Goals menu and select “+ Create conversion action.”
2. Edit data sources for website conversions, enter the domain, and use “Scan” to look for an existing Google tag or linked Analytics property.
3. Select the conversion category closest to the action to measure, such as a lead form or purchase.
4. For a page load such as a thank-you page, select “Automatically without code” and specify the matching type: exact URL, URL containing a particular expression, or URL beginning with a certain prefix.
5. For a button click, purchase amount, or transaction ID, select “Manually with code” and implement the provided event snippet directly or through Tag Manager.
6. Review and save the name, value, counting, click-through conversion window, and attribution in conversion settings.

The URL method is quick and requires no code changes once the tag is installed. However, if the thank-you page can be opened by typing its address directly or is counted again whenever refreshed, measurement becomes inflated; in this case, counting settings and page access are adjusted together. On e-commerce websites, transmitting the order amount and transaction ID is necessary for value-based bidding strategies.