Collect some facts of the company that are related or somewhat relevant to the specific role you are applying for. Also collect some general facts and link them with something related to you (e.g. maybe the company has released a new product and you use this product / have written a thesis about something related).
Then during the interview bring up these facts proactively. Because you have linked the facts to your specific resume / position, this will be possible in a natural way. Also they may appreciate that you did not simply learn some key facts by heart but that you actually dealt with what that means for you and your new position.
By bringing up these points proactively you might decrease the probability of being asked something specific where you do not know the answer to.
However, if time permits, it is probabably best to also learn the most important key facts (even if they are not directly related to you or the vacant position) because you may be asked nevertheless during the interview and also because it is probably good to know at least the basic facts about a company you will potentially work for.
Also do some research on those aspects of the company that you are most enthusiastic about (e.g. a cool algorithm recently developed): If you are able to speak about some aspects of the company with genuine enthusiasm, this may improve the improssion you make during the interview significantly.