Google has reduced the minimum audience size for customer match lists in Search campaigns from 1,000 to just 100 users.
This change is great for small and midsize businesses and allows them to use Customer Match targeting in their Search campaigns, a feature previously out of reach due to high list-size requirements.
For larger clients, this is also a win because I'm sure any advanced marketer has a really laser targeted list they wanted to use but it was ineligible to serve.
Read more at Search Engine Land - https://searchengineland.com/google-slashes-customer-match-list-minimums-in-search-campaigns-to-100-users-455912