This tutorial was originally posted by Zak Parrish from Epic games on their official YT channel but it seems to have been removed for some reason so I thought I'd re-upload it as it's really useful.
This tutorial shows you how to dynamically spawn actors using the construction script.
Chapters:
00:00 Intro
00:45 New Project
1:30 Content Migration
2:20 Input Mappings
4:00 Dynamic Cow Material
7:31 Creating Spawn Volume
13:30 Play Testing
15:10 Spawned Cow Array
16:10 Explosion Particle Migration
17:45 Explosion Blueprint
22:25 Blowing Up The Cows
25:30 Final Test