rephrase; improve grammar, spelling, tone, or punctuation.
Clarification
specify or explain an existing fact or meaning by example or discussion without adding new information.
Simplification
reduce the complexity or breadth of discussion; may remove information.
Point of View
rewrite using encyclopedic, neutral tone; remove bias; apply due weight.
Refactoring
restructure the article; move and rewrite content, without changing the meaning of it.
Fact Update
update numbers, dates, scores, episodes, status, etc. based on newly available information.
Elaboration
extend/add substantive new content; insert a fact or new meaningful assertion (beyond a simple "fact update").
Verifiability
add or modify references and citations; remove unverified text.
Disambiguation
re-link from a disambiguation page to the specific page.
Wikification
format text to meet style guidelines (see Wikipedia:Glossary#Wikify), e.g. add links or remove them where necessary; convert bold text to proper headers, etc.
Vandalism
deliberately attempt to damage the article.
Counter-vandalism
revert or otherwise remove vandalism.
Process
start or continue a wiki process workflow such as tagging (or un-tagging) an article with cleanup, merge or deletion notices.
Template transclusions. E.g. {{citation needed}} or {{Infobox|...}}
Cleanup tag
A template that notes of an issue in the page. E.g. "reads like an advert" or "lacks sources" or "COI involved"
Process tag
A template for deletion or merge process. E.g. {{Prod}} or {{CSD}}.
List
Bulleted, numbered or description list
Markup
Elements used for formatting content (excludes tables, templates and special characters). E.g. ''' (bold), '' (italics) and HTML tags.
Special Characters
Mathematical characters, greek characters, etc. E.g. Σ (Σ) or · (·)
Media
Include Media Files (Images, Audio, Video) objects. Usually in the form of a [[File:...]] link, but sometimes also appears in a template as a parameter filename = File:....
Body Copy
The main article or text part (as distinct from the headings, subheadings, and graphics)
Data value
Numbers, True/False/yes/no, dates or time. E.g. January 3rd, $150, 2015/01/02, {{Infobox president|is_current=yes}}, etc.
Punctuation
Body copy punctuation characters that are intended to appear in text. E.g. periods, commas, asterisks, brackets, colon, dash, etc.
Information
Factual or meaningful information content. E.g. one could change "body copy" without changing the "information" contained.