Info on Cookies dropped by plugin

Here there, we have installed the CleanTalk plugin and the cookie consent service we are using has marked these cookies as ‘unclassified’:

apbct_anticrawler_passed
apbct_site_referer
apbct_urls
ct_timezone
wordpress_apbct_antibot

I think they are all related to CleanTalk. Could please let me know if any of these are necessary to the running of the plugin and a quick explanation of what each one does?

Thanks
Pete