If you are not aware, vSphere 6.0 is coming to the end of life on 12th Mar 2020. If you are still running 6.0 or below, it is a good time to quickly planned for an upgrade to at least version 6.5 or 6.7.
You can refer to the KB. Once end of life, this will end the general support for vSphere 6.0. What this means, is there will be no new patches to fix bugs. You will only get support based on what is recorded in KBs. Also things without any engineering effort. You will only receive technical guidance before end of support.
Here is a good article to understand the different support after End of Life of a product.