Image when you are reading a novel, it must be annoying if chapters of the novel are not sorted orderly, some chapters are missing, chapters are written in different languages, or there are a lot of grammar errors in the novel. There is no doubt that these inconsistencies and errors make it hard to read and extract information from the novel efficiently. Therefore, editors, who proofread and compose books, are important in publication industry. Alike, data cleaning that plays an essential role in preparing consistent, accurate and useful data, works as an editor in the world of data analysis.

Markdown is a useful text editor. You can insert hyperlinks, images, header, quotes, tables, and even code by using Markdown. It also has basic syntax, like emphasis (bold and italic), task lists, strikethrough and emoji.