There are four types of essential conversions you monitor,
1.Track when someone lands on particular page
2.Track when some one calls you after visiting your ads
3.Track when person download your software application
4.Track conversion that happen in offline

Type of Ads in Google Adwords?
 

Types of Google Ads –

#1: Standard Text Ads – Now Called “Expanded Text Ads” (ETAs).
#2: Responsive Search Ads (RSAs).
#3: Dynamic Search Ads (DSAs).
#4: Image Ads.
#5: App Promotion Ads.
#6: Video Ads.