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 Landing page
 Large rectangle
 Last click attribution model
 Last cookie counts principle
 Last interaction model
 Lead follow up
 Lead gen
 Lead generation
 Lifetime commission
 Lightbox
 Lightbox pop-up
 Lightbox pop-up software
 Lightbox subscribe form
 Lights out ad unit
 Like-gate
 Like-gated contest
 Linear attribution model
 Linear video ad
 Link disavowal
 Link disavowal tool
 Link intelligence SEO
 Link network
 Link pyramid
 Link scheme
 Live chat support
 Live support
 Local marketing
 Long click
 Long-tail keywords
 Look-alike targeting
 Loyalty toolbar
 LREC ad banner