1 AZ  AWS 55;  microsoft 48 google 18  (2019)

2 Market share aws 40%, microsftt 30%, google 20% 

3 offered service 

   compute : eC2 , vm, colud engine  --- speed of lunch is different 

    DB:         <relational db>   ,sql, sql 

    storage:   S3, block storage, cloud storage 

    monitoring : clouldwatch, application inside, 

    downtime:  ok, bad, good 

    pricing: 70, 70, 52