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There are several popular attribution models in the market. Based on the channel's position in the sequence, they can be classified as follows:

๐—™๐—ถ๐—ฟ๐˜€๐˜ ๐—–๐—น๐—ถ๐—ฐ๐—ธ: attributes the entire conversion value to the first source in the sequence that introduced the user to the brand.

๐—Ÿ๐—ฎ๐˜€๐˜ ๐—–๐—น๐—ถ๐—ฐ๐—ธ: a popular model where conversion is attributed to the last channel that led to the desired action.

๐—Ÿ๐—ฎ๐˜€๐˜ ๐—ก๐—ผ๐—ป-๐——๐—ถ๐—ฟ๐—ฒ๐—ฐ๐˜ ๐—–๐—น๐—ถ๐—ฐ๐—ธ: was default in Google Analytics reports. The full conversion value is assigned to the last channel in the sequence. However, if it's a direct visit, the value is attributed to the preceding source.

๐—Ÿ๐—ฎ๐˜€๐˜ ๐—ฃ๐—ฎ๐—ถ๐—ฑ ๐—–๐—น๐—ถ๐—ฐ๐—ธ: similar to Last Click, but only considers paid (cpc/cpm) traffic.

๐—Ÿ๐—ถ๐—ป๐—ฒ๐—ฎ๐—ฟ: the value of the transaction is evenly distributed among all channels in the sequence. It is more advanced than single-channel models, as it considers all sessions before the order.

๐—ง๐—ถ๐—บ๐—ฒ ๐——๐—ฒ๐—ฐ๐—ฎ๐˜†: the value of the transaction is distributed incrementally among the channels, especially favoring the last one in the sequence and those closer in time to the conversion.

๐—จ-๐˜€๐—ต๐—ฎ๐—ฝ๐—ฒ: two sources receive higher value (40% each): the one that attracted the customer and the one that motivated the conversion. The remaining 20% is evenly distributed among all channels in the middle of the funnel.

๐— ๐—ฎ๐—ฟ๐—ธ๐—ผ๐˜ƒ ๐—–๐—ต๐—ฎ๐—ถ๐—ป๐˜€: an algorithmic model that assesses the mutual influence of channels on conversion and identifies the most significant channel.

๐——๐—ฎ๐˜๐—ฎ-๐——๐—ฟ๐—ถ๐˜ƒ๐—ฒ๐—ป ๐—”๐˜๐˜๐—ฟ๐—ถ๐—ฏ๐˜‚๐˜๐—ถ๐—ผ๐—ป: another algorithmic model, typically built on Shapley Vector. Considers the order of the channel in the sequence and evaluates how the presence of this channel overall influenced the conversion. Changing session order won't alter the Shapley Vector's value.

๐—ฃ๐—ผ๐˜€๐˜-๐—ฉ๐—ถ๐—ฒ๐˜„: attributes value not after a click but after the user sees the ad and within the attribution window (e.g., 7 days), visits the site, and performs a conversion action.

๐—ฃ๐—ฟ๐—ฒ๐—ฑ๐—ถ๐—ฐ๐˜๐—ถ๐˜ƒ๐—ฒ ๐—”๐˜๐˜๐—ฟ๐—ถ๐—ฏ๐˜‚๐˜๐—ถ๐—ผ๐—ป: Predicts future revenue from an acquired user based on behavioral factors during a specific session. Used in conjunction with machine learning algorithms by services like Segmentstream and Tomi AI.

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