ISO/IEC 23001-11 specifies metadata (Green Metadata) that facilitates the reduction of energy usage during media consumption. The metadata enable means for (a) reducing decoder power consumption, (b) reducing display power consumption, (c) media selection for the joint decoder and display power reduction, and (d) quality recovery after low-power encoding. The third edition, which is currently in development, adds three main aspects to the standard: (1) the existing green metadata for interactive signalling for remote decoder power reduction is enhanced by adding new syntax elements for a finer control of decoder complexity on a high variety of platforms and processor cores; (2) a Versatile Video Coding (VVC) Supplemental Enhancement Information (SEI) message carrying green metadata related to complexity metrics for decoder power reduction; and (3) metrics for quality recovery after low-power encoding. The development of the third edition of the standard is expected to be completed by the end of 2022.