As said in our initial post about Google’s BERT algorithm, there is nothing to optimize for BERT. Google’s Danny Sullivan has confirmed this on Twitter:
There's nothing to optimize for with BERT, nor anything for anyone to be rethinking. The fundamentals of us seeking to reward great content remain unchanged.
— Danny Sullivan (@dannysullivan) October 28, 2019
What can you do?
Ensure that your web pages have good content and good links. As Danny Sullivan says, the fundamentials remain unchanged: