From the website:
Open City Hall is an on-line forum for civic engagement. You are invited to read what others are saying about important Palo Alto topics, then post your own statement. The comments will be available to City officials making decisions on these topics.
When you post your first statement, you will be asked for your name and home address. This confidential information is only used to identify statements from residents in and near Palo Alto – so that users know which statements are from local residents.
As with any public comment process, participation in Open City Hall is voluntary; comments from this Open City Hall forum will be available for city officials to consider.