How long it takes for Twitter carousel to appear under your website in google results
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Dear Moz community,
Not later than 7 days ago I did impelement twitter markup to a website including :
as well as twitter markup to all blog/article posts
The question: I mentioned Moz (when you search for this brand name in Google) it shows a recent tweets carousel, how long it takes for it appear on our website and should I do any additional fixes for it to appear ?
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The short answer is "nobody knows"

Whether or not it will ever show up is completely at Google's discretion. Generally speaking, the only time that carousel will display in the SERPs is if the website is highly authoritative.
If you think about it from Google's point of view, their aim is to provide the highest possible value to their searchers. If you were a local plumber who Tweets a quote or funny joke a couple of times per year, schema markup or not, displaying this in the carousel won't provide any value at all and takes up precious screen real estate.
There's no magic number (that Google is going to give us anyway) that will get it to display either. It could be a combination of Tweet volume and regularity, interaction, followers etc and is likely combined with the strength and relevance of your website in the context of your search query too.
Applying that schema is still a good idea in my opinion, it's just not as simple as "if I apply it to my site, it will definitely display in SERPs". This is true for all forms of schema markup. You're giving your site the best possible chance to display better in the SERPs but it doesn't necessarily mean it will happen.
I hope that helps!
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Thank you Chris a lot for this detailed answer!