9
Last.fm’s Recommendation Engine Erik Frey Last.fm

Erik Frey on Collaborative Filters at SXSW

Embed Size (px)

DESCRIPTION

Erik Frey of Last.fm presenting at "Collaborative Filters: The Evolution of Recommendation Engines" at SXSW Interactive, March 14 2009

Citation preview

Page 1: Erik Frey on Collaborative Filters at SXSW

Last.fm’s Recommendation Engine

Erik Frey Last.fm

Page 2: Erik Frey on Collaborative Filters at SXSW

Last.fm:About•  Listentomusicforfree(supportedbyads)

•  Besocial:25muniqueusers/month•  Radio,videos,events,charts,…•  Recommendations

•  Foundedin2002•  London

Page 3: Erik Frey on Collaborative Filters at SXSW

Recommendations:Overview

•  Somerelationbetween– Millionsofsongs– Millionsofusers

•  Last.fmexposesas:– Musicrecommendations(artists,albums,tracks,events,videos)

– Peoplerecommendations!Findyourmusicalneighbors.– Notjustforrobots:user‐to‐userrecommendations.

•  Differentkindsofrecommendations:– Leanforward(e.g.browsinglistsofsimilarartists)– Leanback(e.g.personalizedradio)

Page 4: Erik Frey on Collaborative Filters at SXSW

Recommendations:LeanForward

Page 5: Erik Frey on Collaborative Filters at SXSW

Recommendations:LeanBack

Page 6: Erik Frey on Collaborative Filters at SXSW

Recommendations:TheRecipe

•  Dataisthemostimportantingredient– Scrobbles(listeningdata)

•  [user,track,timestamp]• 25billion+800millionpermonth

• Nodeliberateuserinput– SocialTags

•  [user,item,tag]• 50million+2.5millionpermonth

• 300kuniquetaggerspermonth

– Andmore:love,ban,skip…

Page 7: Erik Frey on Collaborative Filters at SXSW

TheRecipe:Scrobbles

Page 8: Erik Frey on Collaborative Filters at SXSW

TheRecipe:Tags

AylaNereo

Page 9: Erik Frey on Collaborative Filters at SXSW

User’sattentionprofile

TheRecipe:TwoModels

Modelofhowthingsarerelated

Recs

Scrobbles,tags,…