The phrase "street team" refers to a group of people who promote a brand, product, or event in public spaces, such as streets, parks, or events. They spread awareness and engage with the public to create buzz and generate interest. Full definition
You'll also want to make it known that you're only accepting a limited number of street team members. (draft2digital.com)
You'll want to be very selective, of course — choosing only street team members who have shown that they are willing to support you. (draft2digital.com)
These are just a few of the ways you can be your own street team in marketing your book. (bookelvespublishing.com)