"Fresh data - usually replaced with final data within a few days"

[Hanuman]

Something happened with one of my sites on GSC

Click-through wise there is a small improvement (I am talking about 4 visits more than average), but nothing as dramatic as what the above impression graph shows.

Is this a good thing? Should I expect more traffic in the coming days?

ETA: Average position has seen a nose-dive - from around 40.8 to 72.0 now. So, I guessed that a lot of 'crawled, not indexed' pages are now into the index. Which does NOT seem to be the case though.

 

[Bobish]

GSC is usually a couple days behind so you should already see traffic changes through GA if those impressions are pushing traffic

Avg position is tricky because you could be too 3 for your target keyword but if there are a lot of long tail or related that have you lower, it'll drag the avg down

You can set up a comparison in GSC and sort by change in impressions to see which page or pages are driving this dramatic jump

 

[Ryuzaki]

It could also be something like appearing in an image carousel that nobody ever clicks on but is in the #1 or #2 slot and gets a ton of impressions.

 

[Hanuman]

GSC is usually a couple days behind so you should already see traffic changes through GA if those impressions are pushing traffic

Ha, I wish. I do not see any big traffic change right now. It could either be something like what Ryuzaki has suggested (which is technically possible since I am in a visual niche - but I doubt it though), or my pages are showing up for a ton of new keywords; except they are quite lower down the SERPs so nobody clicks them (perhaps explained by the lower average position).