A mind map, or spidergram, is a technique to make notes on a topic, before writing. It is an organized strategy that illustrates the (hierarchical) relationship between ideas as opposed to an unstructured approach, such as brainstorming, in which students generate notes on paper at random. There some online applications that can help us to make simple mind maps such as Coggle and Popplet.

Using mind maps for English teaching gives many advantages one of them is mind map can become a pre-writing activity task. It makes students brainstorm spontaneously about one topic, developing and relating ideas to connected by their mind. The other thing is mind maps work well as their graphic design helps students to see the connection between ideas, which enables them to group together those ideas as they proceed. Mind maps perform especially well when generated in groups, as this engenders dialogue that helps to generate ideas and makes the activity more fun and lively.

If you want to make a simple mind map I will recommend using Coogle it helps a lot. Even Though if you want to make mind map which more interesting using a picture or something you have to pay to make your account premium, but for the simple mind map, it is totally enough. 

Klik here for the example of the Mind map.