I'm somewhat new to Salesforce development, and I have a task from the architect to create a Before trigger to map a field upon Lead Conversion. This Lead field is already mapped through the native mapping , to an opp field, and needs to mapped to a second one by this trigger, only after the conversion.
I have three doubts: 1 - it shouldn't be a after trigger, since the mapping only happens after lead conversion?
2 - A process builder wouldn't be better in this scenario instead of a trigger?
3 - I'm stuck in how to begin to create the trigger, if some can send me a example it will much appreciated.
Thanks for the help!