What is the significance of the diplomatic meeting between Russia and the US?

The diplomatic meeting represents a major victory for the Kremlin after being isolated diplomatically and financially from the West. Russian Foreign Minister Sergei Lavrov is already celebrating this development, claiming that the US is finally starting to listen to Moscow's position. However, this unexpected thaw in US-Russia relations is causing significant concern among European leaders. The renewed diplomatic engagement is described as 'sending a shiver down the spine of Europe,' indicating serious apprehension about what this shift might mean for regional security and the ongoing situation in Ukraine.