wojciechborowicz

This plugin will let you add Google Ads conversion codes given by Google. 
This includes adding scripts in the head section of your website, to display them on specific pages, checkout or contact form (contact form 7)

Conversion Helper

This plugin will let you add Google Ads conversion codes given by Google.

neeaagh

Easily place tracking code in the header or footer of your entire site or individual posts/pages. This is ideal for embedding remarketing and analytics tags that need to be on every page, as well as conversion code that needs to only be on specific pages. Also supports CSS and JS code.

Conversion And Remarketing Code

Easily place tracking code in the header or footer of your entire site or individual posts/pages.

Conversion Helper vs Conversion And Remarketing Code