Hi @esraokmeen, welcome to the PBC! 🙂
Thank you for your question about impressions and viewers. Like other organic distribution platforms, Pinterest sees natural ebbs and flows with content distribution which results in variations in impression volume and viewership. Often times, fluctuations can result from changes in seasonality, related interests for content, format type, engagement rates or updates that Pinterest makes to our system to better deliver valuable ideas to Pinners.
Just like our users' interests evolve, we can expect the distribution of content to see natural ups and downs as well. We encourage creators to continue to post high-quality, inspiring ideas to see what resonates with their audience on Pinterest.
I hope this helps. Give us a shout if you need anything else! 🙂