A group of post data items may be identified at a first location. Presentation of the group of post data items may be provided at a second location. A post data item in the group of post data items at the second location may be identified where the post data item is in reply to another post data item in the group of post data item. A user may be identified for notification of the post data item. A determination of whether the user interacted with the group of post data items at the first location or the second location is made and a notification for the user that includes a reference to the group of post data items at the first location or the second location is provided.