To send an email confirming opt-in when someone signs up for their emails via a form on their website, a triggered send data extension can be used to capture the form data and deploy the email. The triggered send data extension can be linked to a triggered send definition that contains the email creative and settings. The developer can use the SOAP or REST API to trigger the email from the website form, and the marketing team can change the email creative without involving the developer. References:
https://help.salesforce.com/s/articleView?id=sf.mc_es_triggered_sends.htm&type=5https://help.salesforce.com/s