This answer states that each version of a managed package on the AppExchange undergoes a security review as a benefit of using a managed package versus an open source solution for implementing an event management system within Salesforce for Cloud Kicks. A managed package is a collection of application components that are developed, tested, and distributed by a provider as a single entity on the AppExchange.
An open source solution is a software application that is developed, modified, and distributed by anyone who has access to its source code. A security review is a process that evaluates and verifies that an application meets the security standards and best practices of Salesforce. Each version of a managed package on the AppExchange undergoes a security review as a benefit of using a managed package versus an open source solution because it ensures that the application is safe, reliable, and trustworthy for Cloud Kicks. References:
https://trailhead.salesforce.com/en/content/learn/modules/appexchange_basics/appexchange_basics_intro