Abstract: There is provided, in accordance with some embodiments, a computerized method executed by one or more hardware processors, comprising receiving interaction records, where some of the interaction records comprise a cookie value, a URL (Uniform Resource Locator), and a time stamp. The computerized method comprises computing, from the interaction records, interaction sequences each comprising user interactions. Each adjacent pair of user interactions in each interaction sequence has the same unique user identifier, and attributing at least two interaction values to respective user interactions, where the sum of attributed interaction values is equal to the total value, and where each interaction value is computed using rule(s), respective property values, and the total value. The computerized method comprises updating one or more bidding property on an advertising platform based on the attribution, where the bidding property comprises an advertisement bid value or an advertisement keyword.