Once you log into your ASA account, you will see a Create Campaign button post which you have to choose among 4 different options which define where your ad will be placed in the app store -

a) Today's Tab - The Today tab is the first page users arrive on when they open the App Store‌.
b) Search Tab - Reach users before they search for apps to download. Your ad will appear at the top of the suggested apps list.
c) Search Results - When the user will start looking for your or related application, this is when your app will start to pop up to end users
d) Product Pages - Your ad will appear at the top of the You Might Also Like list to users who have scrolled to the bottom of relevant product pages.

Create ad groups, set a budget for CPT (Cost per tap) and run the campaign

Go to integration page. Search for "Apple search Ads" and authenticate and connect your apple search ads account over the platform
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Once authenticated the data will populate in the partners reports.
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Timezone difference - There could be timezone difference between ASA and Trackier platform due to which user can see a slight discrepancy in data

Install time - ASA count app install time and we count the first open

Winning click - ASA always attributes itself if the user engaged or download the app. Trackier has visibility across multiple networks, and attribute according to last-click methodology

Re-install - There could be discrepancy is re-install data as well because Trackier considers re-installs only for installs on the same device and apple considers reinstall on any install of the same user.