A Venn diagram can be a great way to explain a business concept. This is generally not difficult to create in modern presentation software. I often use Google Slides for its collaboration abilities.
Where it becomes difficult is when you want to add a unique colour/pattern to an intersection, where the circles overlap. Generally you will either get one circle overlapping another, or if you set some transparency then the intersection will become a blend of the colours of the circles.
I could not work out how to do this in Google Slides, so on this occasion I cheated and did it in Microsoft PowerPoint instead. I then imported the resulting slide into Slides.
This worked for me in PowerPoint for Mac 2016. The process is probably the same on Windows.
Firstly, create a SmartArt Venn Diagram
Insert > SmartArt > Relationship > Basic Venn
Separate the Venn circles
SmartArt Design > Convert > Convert to Shapes
Shape Format > Group Objects > Ungroup
Split out the intersections
Shape Format > Merge Shapes > Fragment
From there, you can select the intersection as an independent shape. You can treat each piece separately. Try giving them different colours or even moving them apart.
This can be a simple but impactful way to get your point across.