Method of advertising

There is disclosed a method of presenting advertisements on devices or apparatus (18) in which software applications ("apps") can be installed, pre 5 installed, or run. The invention involves the identification of stages of use of the apps, and of advert types for presenting on the devices, and of subsets of those advert types suitable for those stages. The method includes the steps (12, 14, 16) of providing software codes for implementation in apps, and adapted to configure the apps to cause advert types from the subsets to be 10 presented on the devices during relevant stages. The method also includes becoming eligible for remuneration when predetermined interactions occur between device users and the advertisements. Entry Stage Fig. 1 18 (when the user installs 12 10 the app) 20 Engagement Stage 22 (when the user is using FREE APP (engaging with) the app) Fig. 2 Exit Stage 18 24 (after the user has finished 16 \ using the app) 20 --- 30 send Fig. 3 c 30 38 Free ap1 30 40 -- 32 Fe rM I I Free ap 3 mr r---34 Mr r ---34 Fig. 4 Fig. 5 F=ig. 6 18 18 C=18 5 2 App 1 r -4 \I Notification . .48\1 App0 area & 20 Ap3Notification 1 50 -52 App 4 Notification 2 App 5 Free app - -- 46 Fig. 7 Fig. 5 Fig. 6