In accordance with Fig. $8\mathrm{.}4$ in chapter $8$: possible levels of segmentations, exploit

online individual segmentation real life cases for Booking.com and Shopee by

giving $2$ real$-$life experiences for EACH and give insights from viewpoint of one to

one marketing and customization.

For figure $8\mathrm{.}4$ the levels are from 'full market coverage' $,$ 'Multiple segments', 'Single segments' to 'individuals as segments'.