It is good practice to fill in the Edit Summary field which is marked "Please comment about this change" below the text editor box. This practice helps everyone to understand what is changed, for example when perusing the history of the page.

There are basically about 13 reasons why people edit articles.

• Add information (including photographs, diagrams, audio, or other media related to the topic)
• Add link
• Clarify information (rewording existing content without adding anything new)
• Delete information
• Delete link
• Fix link
• Format (affecting structure of the whole page)
• Grammar
• Mark–up language (changes that do not affect the content)
• Reversion (reversal of vandalism or a return to a previous article state)
• Spelling
• Style/topography (affecting the presentation/appearance of text)
• Vandalism