Twitch’s goal with measuring campaign performance includes: (select all that apply)

Twitch measures campaign performance to understand the effectiveness of its partners' content and strategies, which directly addresses "Measure the success of its partners." By analyzing what works well, Twitch can then "Share best practices" with other creators and advertisers, fostering a more successful ecosystem. The insights gained from performance data are crucial for optimizing future advertising expenditures and content strategies, thus helping to "Inform current and future buys." While generating new partners is a business objective, it's a broader outcome of a successful platform, not a direct goal of measuring campaign performance itself.