This information is used in the context of the sensitive sample user matching.
If another user uploads a sensitive sample that matches a sensitive sample that you uploaded, then Exalyze will make your contact information available to this user and you will get access to their contact information as well.
If you wish to enable this feature, please provide your contact information. You can also choose to opt-out from this feature at any time by not providing or removing your contact information.
If you choose to remove your contact information, all matches related to your user will be made unavailable to you and the users you matched.