They refer to several studies that they don't cite, thus I can't look at them.Or to translate, "I don't really know what all of that means, so I'm calling it correlational as a way of pretending I can ignore it".
Correlational:
More-rigorous analyses added direct evidence. A preprint study4 posted in early August (and not yet peer reviewed), found that weekly increases in per-capita mortality were four times lower in places where masks were the norm or recommended by the government, compared with other regions. Researchers looked at 200 countries, including Mongolia, which adopted mask use in January and, as of May, had recorded no deaths related to COVID-19. Another study5looked at the effects of US state-government mandates for mask use in April and May. Researchers estimated that those reduced the growth of COVID-19 cases by up to 2 percentage points per day. They cautiously suggest that mandates might have averted as many as 450,000 cases, after controlling for other mitigation measures, such as physical distancing.
Remember when I said the cases went down in ivermectin countries and you said that isn't proof of anything and didn't even want to look into it?
STAY CONSISTENT IN WHAT YOU DEEM AS PROOF.