Personally, I've never used it, and the only reason I've used RSS feeds AT ALL in say, hmmm, about the last 8 years, is to connect it to Aweber, so every time I publish a new article on my website it automatically gets sent to my email subscribers.
The Pinterest RSS works in exactly the same way, whenever you publish content on your website, pins will be created automatically from your new content and published to the applicable Pinterest board WITHIN 24 HOURS!!!
As I say, I've never used, so I don't really want to advise more, Andy would probably be the person to speak to, and I'm sure there's YT vids about Pinterest RSS (but as with many specific questions, such as yours, it takes a LOT of searching in Google/YT to finally get a decent answer... you could ask ChatGPT to see if they can troubleshoot the issue)
For you, yep it probably makes sense to have your Pinterest RSS set up, as you have a visual niche, Pinterest accounts for a LOT of your traffic, so the more efficient you can be with Pinterest, the better it is for your site overall.
Sorry, that's all I've got... we'll wait for Andy!!!
@partha ahaaaaaa, I think I understand now what happened! I won't use it, because something has been irritating me on Pinterest! It was always sharing new posts indeed, posts that I didn't planned, and it just shared the images from Amazon (made with Tasty wp, instead of my actual ow pictures),and I always had to remove them, they were fuzzy and all and I don't even know if Amazon allows this!
So I'll just ignore the messages, thanks!
@ohnoo_not_her Yep, RSS feeds just pull information from the (feed) element of a url (this is often why you see (feed) on GSC urls, they're created in the background should you want to use them, most people don't).
But, yep, that makes sense, an RSS will pull "ANY relevant information" from a page if it's "media-based" (images or videos), so all that the Pinterest RSS is doing is grabbing hold of the most relevant images from that article (they don't care who or where the image came from, if it's in your content they'll use it), and then publishing that!!
It would work out fine probably if EVERY image in that content was yours, but obviously most images on your website have been created for WordPress, so the difference in pixels, size, clarity can cause "blurriness" when transferred to Pinterest.