We have Hotjar installed and make use of the heat maps, scroll maps and session recordings so we have a good idea of where visitors are getting stuck. We also have Google Optimize installed and set up ready for A-B testing although we haven't used it yet.

I plan to have a template file for all the third party tags - Google Analytics, Facebook pixel, Hotjar, etc. This file will be imported by the header file but will be separate to make adjustments simpler.

What else should I be aware of whilst refactoring?