AI engineering glossary · Time series recsys
What is long tail?
Long tail: The large set of items that each receive few interactions, contrasted with a small head of very popular items. Recommenders tend to favour the head, so helping users reach the tail is a common goal.
Long tail: an example
In a catalogue of 100,000 books, 500 bestsellers may account for most of the purchases.
Related terms
More Time series recsys terms
- Moving average
- Moving average model
- Multi-stage recommender pipeline
- Multi-step forecasting
- Multiplicative decomposition
- N-BEATS
- Naive forecast
- Novelty
Where you learn it
Long tail is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.