Abstract: A method of providing a level of certification of an attribute of an item is disclosed. A requirement is determined for a level of certification for an attribute of an item. A notification is provided of an evidence item that is to be submitted to evaluate the level of certification of the attribute of the item. The evidence item is received. The level of certification of the attribute of the item is determined based on the received evidence item.

Abstract: A system, computer-readable storage medium storing at least one program, and computer-implemented method for automatically posting content to a network accessible content collection are described. User activity over a communication network from a client device is tracked and a triggering event is detected. In response to detecting the triggering event, a content item is automatically posted to a network accessible collection of content items viewable by additional users.

Abstract: Methods and systems for facilitating the referrals of items provided by a network-based publication system are described. In some example embodiments, the methods and systems may provide a mechanism to receive referrals from viewers of items (e.g., viewers of product description information associated with items available for purchase) and/or surface items that have been referred to other viewers looking to purchase items via the network-based publication system.

Abstract: A method of providing a level of certification of an attribute of an item is disclosed. A requirement is determined for a level of certification for an attribute of an item. A notification is provided of an evidence item that is to be submitted to evaluate the level of certification of the attribute of the item. The evidence item is received. The level of certification of the attribute of the item is determined based on the received evidence item.

Abstract: A system, computer-readable storage medium storing at least one program, and computer-implemented method for automatically posting content to a network accessible content collection are described. User activity over a communication network from a client device is tracked and a triggering event is detected. In response to detecting the triggering event, a content item is automatically posted to a network accessible collection of content items viewable by additional users.

Abstract: A mobile app creates and optimizes a shopping list of items based on one or more predetermined objectives for a shopping trip. The objectives include total cost, time, number of stops, preferred stores, preferred brands, and others. The mobile app may calculate total costs for the items from prices at one or more stores near the shopper. The app. divides the items among multiple stores, factoring in travel, fuel, preferences, discounts, coupons, store loyalty cards, item availability, and the like and optimizes the order the items are purchased from multiple stores, based on the objective(s). Shopping may also be ordered by sequence of item selection within stores.