Google has announced to release June security update for Nexus 6P in the first week of June. The June security update for Nexus 6P will be available as build N2G47W and expected to be release on June 6. The update will be rolling out via OTA weighing 33MB so you need to tune your device to get the OTA, go to Settings > About device > System updates.
The update seems to be a minor update but it’s very important to keep your device updated with latest security patch installed on it. The update works as a shied against Malware and Exposures that mostly attack via Internet, so never wait for the Virus to attack always keep your device secure. The June security update for Nexus 6P also brings some stability improvements, tweaks and bug fixes as well.