Added quality section (#542)

* Added quality section

* Update content/en/style-guide/_index.md

Co-authored-by: Noah Ispas <13436814+iamNoah1@users.noreply.github.com>

* Update _index.md

* Update content/en/style-guide/_index.md

change request from seokho

Co-authored-by: Seokho Son <shsongist@gmail.com>

Co-authored-by: Noah Ispas <13436814+iamNoah1@users.noreply.github.com>
Co-authored-by: Seokho Son <shsongist@gmail.com>

content/en/style-guide/_index.md

@@ -105,6 +105,14 @@ The definitions for **technology** and **concept** categories contain three subh
 
 Note that **properties** don't require separate sections. A definition will suffice. 
 
+#### Quality is paramount
+
+If merged, your submission will be the official CNCF definition for that term (until someone else improves it). Creating a term that meets the CNCF's high standards can't be rushed — quality takes time and effort.
+
+**Do your research**: Even if you are confident you know the term, verify you got it right. We often use terms in organizations a certain way that may not reflect the full picture. When you do your research, especially when you're not 100% familiar with the term, use multiple resources. Many definitions are one-sided, especially if provided by a vendor. The Glossary must contain vendor-neutral, globally accepted definitions.
+
+**Don't plagiarize**. The same rules apply to Glossary as to any other serious publication. Don't copy and paste other people's work unless you are quoting and contributing it to them. If you like a particular section of a definition, paraphrase it in your own words.
+
 #### Keeping it simple
 
 The Glossary aims at **explaining complex concepts in simple words** — that is a surprisingly difficult task that will likely take multiple revisions. Always keep the audience in mind when drafting your definition. Avoid using industry terms and buzzwords — you'll probably catch yourself going back to them and may need to autocorrect.