Content etiquettes means content manners. Like some ethical stuffs, content should be followed some manners. How that manners should be?
Firstly, you've to keep an eye on plagiarism.

~https://images.app.goo.gl/ntwCTcbaoZM4keXd6

Now, question is what is plagiarism?
If you copied text or file from some others content and didn't mention the source, that's called plagiarism. Now a days, plagiarism is considering as a crime. In India and Poland, government enforces copyright law. Some other countries are also looking forward to it.

Now, i'm describing about plagiarism. There are four kind of plagiarism. They are :

(1)DIRECT PLAGIARISM : among other plagiarism, direct plagiarism is most harmful. If you intentionally copied text from other author's content and didn’t mentioned his/her name or content's address, it'll be called direct plagiarism. This is unethical and original author can take disciplinary action against the plagiarist.

(2) MOSAIC PLAGIARISM : this type of plagiarism may be unintentionally held. If you added the source address but you forgot the use of equations mark properly, would be considered as mosaic plagiarism. And also paraphrasing other's content, if you do 'patch-writing' certain parts and then copy - paste, it will be a mosaic plagiarism.

(3) SELF PLAGIARISM : It's one of the common plagiarism. Mostly held in academic institutions. If you submit previous submitted paper into a new project will be considered as self plagiarism.

(4) ACCIDENTAL PLAGIARISM : it's also one of common plagiarism. If you mentioned main content writer's name but didn't linked the source address properly or linked wrong address would be considered as accidental plagiarism.

These are four kinds of plagiarism.

Here's a quote, adding below.
"Yes, I have read and understood the Steemit Etiquette on Steemit Community and will do my best to embrace them."
Source

~https://images.app.goo.gl/1PeGoCw61c58AFEeA
★Now, i've to talk about how to avoid plagiarism?
-You have to like others content, it's ok. But you have to conscious about mentioning original author's name and source address. If you do it, original author should be greatfull to you and respects you. So, why plagiarism? Stop this.

Specially thanks to @cryptokannon for instructions.

And requests to @tarpan @abuahmad @sm-shagor review this post.