Question: What are some do's and don't regarding facemasks

Answer passage (source: WHO):
page_title: Q&A: Masks and COVID-19
section_headers: Does WHO recommend the use of non-medical masks in the community?
section_content: Currently there is not enough evidence for or against the use of masks
(medical or other) for healthy individuals in the wider community. WHO
continues to recommend that medical masks be worn by individuals who are sick
or those caring for them. WHO is actively studying the rapidly evolving
science on masks and continuously updates its guidance.
In the interim, to support countries in their decision-making process WHO has
provided advice through a risk-based approach for the use of masks in the
context of COVID-19.

Reviewer feedback on this answer:
All this response says is there's not enough evidence for or against mask. It doesn't actually tell you how to use them or what those pros and cons are. Misses the mark
Fairly certain this info is outdated. Most places being hit hard are requiring masks be worn in public. Does not address the actual question.

Reviewer ratings:
Bad
Bad

Answer passage (source: WHO):
page_title: Q&A on coronaviruses (COVID-19)
section_headers: How to properly wear a medical mask?
section_content: If you choose to wear a mask:

Before touching the mask, clean hands with an alcohol-based hand rub or soap and water
Take the mask and inspect it for tears or holes.
Orient which side is the top side (where the metal strip is).
Ensure the proper side of the mask faces outwards (the coloured side).
Place the mask to your face. Pinch the metal strip or stiff edge of the mask so it moulds to the shape of your nose.
Pull down the mask’s bottom so it covers your mouth and your chin.
Do not touch the mask while you are wearing it for protection.
After use, take off the mask with clean hands; remove the elastic loops from behind the ears while keeping the mask away from your face and clothes, to avoid touching potentially contaminated surfaces of the mask. 
Discard the mask in a closed bin immediately after use. Do not reuse the mask.
Perform hand hygiene after touching or discarding the mask – Use alcohol-based hand rub or, if visibly soiled, wash your hands with soap and water.

Be aware that there is a global shortage of medical masks (both surgical masks
and N95 masks). These should be reserved as much as possible for health care
workers.
Remember that masks are not a substitute for other, more effective ways to
protect yourself and others against COVID-19 such as frequently washing your
hands, covering your cough with the bend of elbow or tissue and maintain a
distance of at least 1 meter from others. See basic protective measures
against the new coronavirus for more
information.
Follow the advice of your national health authority on the use of masks.

Reviewer feedback on this answer:
Provides solid advice on mask wearing plus links on further precaution measures.
This is a great list of bullet points that share some of the dos and don'ts of wearing a mask and that's exactly what the question was asking about. There's also a link for more basic protective info

Reviewer ratings:
Excellent
Excellent

Answer passage (source: WHO):
page_title: Q&A: Masks and COVID-19
section_headers: What is WHO’s view on masks?
section_content: WHO recognizes that there are many questions about the use of face masks to
prevent the transmission of COVID-19 in the community, and that many countries
are recommending that people wear them. Wearing a medical mask can limit the
spread of certain respiratory viral diseases, including COVID-19. However, the
use of a mask alone is not sufficient to provide an adequate level of
protection. Other measures such as physical distancing and hand hygiene should
be adopted.
WHO aims to provide the most scientifically sound yet practical
recommendations for the safety and wellbeing of individuals in all settings.
At present, WHO recommends a risk-based approach to be considered by decision
makers when deciding in which settings and circumstances non-medical masks
could be used in the community.
Please see: Advice on the use of masks.

Reviewer feedback on this answer:
Does not address the actual question. Reads more like a cheer leading pep talk for WHO.
This response mostly just speaks to the effects of wearing a mask but doesn't give any instructional dos and don'ts that are asked for in the question so it needs that information here

Reviewer ratings:
Bad
Could be Improved