Historically, we have the highest concentration of greenhouse gases in the air, with energy, industry and transport being the biggest contributors. One of the measures to reduce consumption is the introduction of smart metering systems (IMS), which have been installed in our country since 2013, and there are now half a million electricity consumption points equipped with smart meters. The current state of use of IMS data is concentrated on the extraction of consumption data and its use to generate bills for the end-user, and the uptake of new energy services has been slow and embarrassing. Only part of the metered data is also shared with customers and other market participants, the rest of the data hides as yet untapped potential. There is a growing number of innovative projects and products in neighbouring countries dealing with advanced energy data analytics from IMS, which helps them to increase the prestige of scientific research institutions, but also the competitiveness of companies in the local as well as European market. Slovakia has a lot of catching up to do in this respect. The potential lies in proactive services to provide end-users with useful information on the basis of the analysis of these data regarding their consumption, their environmental impact (also usable in ESG repotre), the possibilities of integrating RES into their energy management, or information on anomalies (possible malfunctions) of equipment, or on the possibilities of using new products, e.g. credit metering in the case of customers at risk of energy poverty. We should also think about other energy media, such as heat, where there is also great potential in terms of the use of waste heat that could benefit us all.