2 0 1 4 , ▁and ▁will ▁top ▁$ 4 . 6 bn ▁in ▁ 2 0 1 6 , ▁and ▁over ▁$ 6 . 8 bn ▁by ▁the ▁end ▁of ▁ 2 0 1 9 . ▁Other ▁ways ▁mobile ▁advert ising ▁can ▁be ▁purchased ▁include ▁working ▁with ▁a ▁Mobile ▁Dem and ▁Side ▁Platform , ▁in ▁which ▁ad ▁impress ions ▁are ▁bought ▁in ▁real - time ▁on ▁an ▁Ad ▁exchange . ▁Another ▁report ▁has ▁indicated ▁that ▁world wide ▁mobile ▁digital ▁advert ising ▁spend ▁would ▁reach ▁$ 1 8 4 . 9 1 ▁b n ▁in ▁ 2 0 1 8 , ▁$ 2 1 7 . 4 2 ▁b n ▁in ▁ 2 0 1 9 ▁and ▁$ 2 4 7 . 3 6 ▁b n ▁in ▁ 2 0 2 0 . ▁ ▁Over view ▁▁ ▁Some ▁see ▁mobile ▁advert ising ▁as ▁closely ▁related ▁to ▁online ▁or ▁internet ▁advert ising , ▁though ▁its ▁reach ▁is ▁far ▁greater ▁— ▁currently , ▁most ▁mobile ▁advert ising ▁is ▁target ed ▁at ▁mobile ▁ph ones , ▁that ▁came ▁at ▁an ▁estimated ▁global ▁total ▁of ▁$ 4 . 6 bn ▁as ▁of ▁ 2 0 0 9 . ▁Not ably ▁computers , ▁including ▁des kt ops ▁and ▁la pt ops , ▁are ▁currently ▁estimated ▁at ▁ 1 . 1 ▁billion ▁glob ally . ▁Moreover , ▁mobile ▁advert ising ▁includes ▁S MS ▁and ▁M MS ▁advert ising ▁units ▁in ▁addition ▁to ▁the ▁advert is ement ▁types ▁served ▁and ▁processed ▁via ▁online ▁channels . ▁ ▁It ▁is ▁probable ▁that