Word

Definition

Cold Start

When an item or user has just been added to your product and has minimal behavioral or context information.

Embedding

Compressed numerical representations that encapsulate the underlying features or attributes of the data type.

Model deployment

The process of creating or replacing a new model that can be accessed through the rank endpoint. Typically performed after a new model is trained.

Feature

An attribute associated with a user, item, or interaction that is used as input to your model. For example, age could be a user feature, price could be an item feature, device type could be an interaction context feature.

Interaction

An event that relates a user to an item. For example, a user replying to a social post, giving a movie a rating, a user following another user.

Item

Anything that a user interacts with. These are the things you’ll want to rank. For example: social posts, movies or other users.

Model

A machine-learning program that can make predictions from a given input based on patterns of previously seen data.

Online Store

A store for the features that are fed into a machine-learning model. This is a low-latency key-value store that typically contains the user and item context features.

Prediction

An estimation from a model. In our case this is typically a prediction of the most relevant items for each user.

Ranking

An optimal ordering of items surfaced to your users. This is what Shaped can find for you.

Recommendation

An optimal ordering of items surfaced to your users. At Shaped we keep this definition the same as ranking.

Training

When a model is training, it is looking at historical data and “learning” the relationships between your users and items. A trained model can be used to predict the items that are most relevant to a user (even if the user or item wasn’t seen at train time).

User

A product user identifier. For example, a logged in user, session, cookie or group identifier.