In your WordPress installation, go to plugins. Then type: “WooCommerce Conversion Tracking”. This plugin will automatically add the conversion tracking code to your purchase page of woocommerce.
In the woocommerce conversion tracking, activate Google AdWords under integration settings.
Then, go to your Google Adwords account, click on tools at the top, then choose “conversion” under “statistics”. Then, create a conversion, at step 2, choose to install the conversion tag yourself. You will scroll down and see a code like AW-93049343. You must copy this code (and only this code) to the account ID field of the plugin “woocommerce conversion tracking.” then click on “purchase” close to “event”. This tag is added to every page because it is a requirement from Google Adwords.