Do you have specific actions on your website that you want to track conversions on such as lead generation forms, ecommerce transactions, newsletter subscriptions, video views, clicking or hovering over information or images, performing specific interactions, interacting with a web app?
Do you want to send these interactions to Google Analytics so that you can draw conclusions about users' behaviour, and/or would you like to track conversions on other platforms such as Facebook, Google Ads, YouTube, Email Marketing, Linkedin etc?
If so, this custom will track whatever you want, however you want it (and I'm happy to give advice regarding what you need).
Do you need to set up your Google Analytics, track goals, set up filters, implement Ecommerce tracking, implement cross-domain tracking, create custom dimensions or metrics, or create custom digital marketing channels?