What do the above two lines mean?

It means that you need to leave two spaces at the beginning of a paragraph to start writing an article, which is generally a general requirement of the article format, as is the word document written on paper or computer. Similar formats require line spacing, word spacing, etc. , and there are relevant requirements in an article in the official word document.

Style refers to an independent text genre (or style, system), a norm and mode of text composition, a unique cultural phenomenon and a product of long-term accumulation of certain historical content. It reflects the overall characteristics of the text from content to form and belongs to the category of form. In addition, style is also a general term for entertainment and sports.