The images on the website are not contractual and should not be used as a user manual.

Furthermore, the pictures are generic and can be found on the Internet https://www.google.ch/search: and are used by many online retailers.
Therefore, it is best to consult professionals or the manufacturer directly before purchasing, to make sure that it is used correctly.

This does not necessarily mean that you should not put this paste on top of the processor. The opinion of some people on a discord is not always valid, without necessarily judging the quality of the information you have received.