Hi Amy,

I hope you are well today and thank you for your questions.

I’m currently setting up conversion tracking for adwords and wondered how best to add the Global site tag to each of my web pages? And then how to add an event snippet tag to just one individual page?

You can try adding them using following solutions.

https://wordpress.org/plugins/global-site-tag-tracking/

https://wordpress.org/plugins/wp-global-site-tag/

https://wordpress.org/plugins/wp-google-analytics-events/

I wondered also if my Google Analytics ID (already inputted in custom code section) would act as a form of global site tag? And I wanted to ensure one wouldn’t affect the other.

Yes it is Global site tag and may affect other so please test it.

Best regards,
Shufflehound team