MongoDB Charts now allows developers to embed charts with customizable filters, enabling more personalized visualizations for users. This feature enables developers to specify a custom filter query string parameter whose value is an MQL filter document, which is applied at the time the chart is rendered. The Verified Signature authentication model ensures that users can only filter the chart in a way allowed by the developer, and autorefresh allows charts to automatically reload after a specified number of seconds without reloading the entire IFRAME. This improvement addresses limitations of the initial release of embedding, such as not allowing for refreshing charts or providing users with sensitive data.