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Activity › Forums › Salesforce® Discussions › What is the difference between WhoId and WhatId on Task?

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  • Anjali

    Member
    August 7, 2018 at 5:54 AM

    Hi Shradha

    WhoID refers to people things.So that would be typically a Lead ID or a Contact ID

    WhatID refers to object type things.That would typically be an Account ID or an Opportunity ID

  • Avnish Yadav

    Member
    September 5, 2018 at 1:35 PM

    Hi,

    WhoID in Salesforce refers to people things.  So that would be typically a Lead ID or a Contact ID. The WhoId represents a human such as a lead or a contact. WhoIds are polymorphic. Polymorphic means a WhoId is equivalent to a contact’s ID or a lead’s ID. The label is Name ID.

    WhatID in Salesforce refers to object type things.  That would typically be an Account ID or an Opportunity ID. The WhatId represents nonhuman objects such as accounts, opportunities, campaigns, cases, or custom objects. WhatIds are polymorphic. Polymorphic means a WhatId is equivalent to the ID of a related object. The label is Related To ID.

    Thanks.

  • Parul

    Member
    September 5, 2018 at 2:00 PM

    Hello Shradha.

    These are related objects IDs on the task record.
    WhatId could be used to link that activity with Account, Oppty, Custom object etc

    WhoId can be used to link the activity with Contact, Lead etc.

    Thanks.

    • This reply was modified 7 years, 3 months ago by  Parul.

  • shariq

    Member
    September 15, 2018 at 2:05 AM

    Hi,

    To make it more simple to understand -

    WhatID - Refers to object.

    Example: Account Id, Opportunity Id.

    WhoId - Refers to people.

    Example: Lead Id, Contact Id.

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