Thanks for your question! Regarding the kind of integration required to use VEC, check out our VEC Best Practices and Limitations article in Target's Product Documentation. Also, this table should be helpful to understand the different VEC options and requirements for each. I hope this is helpful -- feel free to reach out here if you have any follow- up questions!
I thought of you and your question when I learned about the session that our Customer Care team is hosting on November 15th on all things VEC. Check out the announcement here, and feel free to register for the session directly by clicking here. Hope this is helpful as you learn more about Target's capabilities!