3 件の回答
I can't help with some of those
1) You can see all your abjects and field using Schema Manager, or click on Create >> Objects to view them
2) Mapping from lead to contact is in Custmize >> Leads >> Fields. Click on a button called "Map Lead Fields"
3) I don't use Google Analytics or Marketo, so I cannot provide any insight here
There are also many good courses on Trailhead that will probably help a lot