This type of diagrams are simply for the sake to add more creative to the slide. You may never know the theme for the whole presentation could be 4 hexagons, as it might resemble the logo of the brand. 

This type of template is used generally by marketing people to explain the key points for their services. It is also used for education services where it becomes easy for the teachers to explain the 4 important points of a particular topic.

The disadvantage for such particular slides are:

1. There is no space to add images relatable to content
2. Neither can you write only the heading nor anything in brief.
3. It is not balanced out slide
4. The emoticons used have no relevance 
5. Difficult to understand clearly with only content being on to the slide

Another feature of this hexagonal template is that all the shapes aren’t connected to each other, means the flow in the presentation is missing. Neither there is one center point to regulate all other points

This type of slide is perfect match for medical & hospitality industry where they have to convey their message in a very concise manner & hexagons helps them convey the message easily because hexagon generally means available in spheres