Adding an image is supposed to be easy in markdown. Syntax is like:
![alt](path "title"), in which:
altis alternate text, provides alternative information for the image if user cannot view it for some reason like slow connection, wrong path or user is using screen reader;
pathis image file link, most important part;
titleis tooltip text (optional), appears when cursor is floating over the image.
In this article I will mainly talk about the image file path or link or whatever you name it. But if you want to make a quick choice in different solutions, follow the map below and jump to the section directly.