Thank you for your extensive and prompt reply, Derrick!
On our Squarespace Analytics Traffic Sources page, we see only Direct, Social, Search, and Referral, no DIsplay Ads, no Paid, Paid Search, or Paid Social. The number of referrals from Nextdoor has increased to 4 total (instead of 2) in the last few days.
You state that the Referral category is content that does not fit under other channels. I take this to mean that a Referral from a Paid ad on Nextdoor should appear under one of the Paid categories, and will be excluded from the Referral category. Did I get that right?
If so, I still have a huge discrepancy, with Nextdoor claiming over 50 clicks and Squarespace showing only 2 (now updated to 4). And again, nothing under Display Ads or Paid categories.
If we are getting referrals from paid advertising from Nextdoor, why does nothing show up under a paid category on Squarespace?
Thanks once again!