“Use Infographics” is one of the things that people post here repeatedly as a technique to improve SEO, but I’ve yet to see anybody offer an explanation of how this technique is meant to work.
The prroblem with infographics is that search engines (and visually-impaired visitors) cannot “read” the information contained in them, so unless you also provide some kind of text equivalent, that’s a chunk of content you’ve made inaccessible and removed from indexing. On that basis, I’d say infographics do not help SEO in any way. If I’m wrong, I’d be most interested to see an article from an authoritative source explaining how this works.
For an explanation of how to use an infographic to increase traffic, there is a very good post in another topic: