Wikipedia:ALSO

A simple article should have at least a lead section and references. As editors add complexity where required, the elements (such as sections and templates) that are used typically appear in the following order, although they would not all appear in the same article at the same time:

Headings introduce sections and subsections, clarify articles by breaking up text, organize content, and populate the . Very short or very long sections and subsections in an article look cluttered and inhibit the flow of the prose. Short paragraphs and single sentences generally do not warrant their own subheading.

Headings follow a six-level hierarchy, starting at 1 and ending at 6. The level of the heading is defined by the number of equal signs on either side of the title. Heading 1 (=Heading 1=) is automatically generated as the title of the article, and is never appropriate within the body of articles. Sections start at the second level (==Heading 2==), with subsections at the third level (===Heading 3===), and additional levels of subsections at the fourth level (====Heading 4====), fifth level, and sixth level. Sections should be consecutive, such that they do not skip levels from sections to sub-subsections; the exact methodology is part of the Accessibility guideline. Between sections, there should be a single blank line; multiple blank lines in the edit window create too much white space in the article. There is no need to include a blank line between a heading and sub-heading.

In other cases, community-wide guidelines provide suggested orders:

If a section is named inappropriately you may also use the {{}} template.

When a section is a summary of another article that provides a full exposition of the section, a link to that article should appear immediately under the section heading. You can use the {{}} template to generate a "Main article" link.

For example, to generate a "See also" link to the article on , type , which will generate:

Sections usually consist of paragraphs of running prose. Between paragraphs—as between sections—there should be a single blank line and the first line of each paragraph is not indented. Bullet points should not be used in the lead of an article, and should not be used in the body unless for breaking up a large, grey mass of text, particularly if the topic requires significant effort on the part of the reader. However, bulleted lists are typical in the reference and further-reading sections towards the end of the article. Bullet points are usually not separated by blank lines, as that causes an accessibility issue (WP:LISTGAP).

...
Wikipedia