section_personalization.md

Personalization

Notes:

Personalization

• Different ranking per user
• Gender, age
• Favorite color, brand

Notes:

Solve

$$f(\text{query}, \text{document}, \text{weights}, \text{user context}) = \text{rank}$$

Notes:

Obtain result clicks

Query	Favorite color	Document	Clicks	Current Rank
shirt	red	Blue shirt	1	1
shirt	red	Red shirt	5	3
shirt	blue	Red shirt	2	2
shirt	blue	Blue shirt	8	4

Notes:

Rank	Query	Is Favorite Color	FeatureN	Comment
3	red	1	1	Red shirt, user likes red
2	red	0	0	Red shirt, user likes blue
1	blue	0	2	Blue shirt, user likes red
4	blue	1	0	Blue shirt, user likes blue

Notes:

Re-Rank Formula

$$\begin{aligned} 5 &\times \text{title relevance}\\\ + 4.3 &\times \text{product age}\\\ + 3.5 &\times \text{user's favorite color} \end{aligned}$$