Simply speaking, testing means that the seller pays for people to come to the store to buy products, such as Facebook groups, and find some real buyers who are willing to leave reviews for you. Consumers buy products in the store, and the store will pay all costs.

Evaluation is to find a self-built evaluation team to conduct it. There are some evaluation teams that conduct store evaluations for Amazon, which is also a good way to get evaluations. Generally speaking, the reviewers who have cooperated will more or less know some evaluation teams and individuals in the same industry, and can get more evaluation resources through the relationship with the reviewers they have cooperated with before.