I would suggest you go for online Informatica Training by Intellipaat, they are the best who provides online Informatica training. You can get the industry acceptable Certificate by Intellipaat and moreover, this course is being taught by experienced Trainers, so ultimately you will get a great knowledge of Informatica.
Let's know something about Informatica:-
Talking about Informatica, it is a Software development company, which offers data integration products. It offers products for ETL, data masking, data Quality, data replica, data virtualization, master data management, etc.
You can learn more on Informatica from here:-
Informatica Tutorial- Informatica Tutorial – Learn Informatica from Experts.
Informatica Interview Questions - Informatica Interview Questions and Answers.
Here is also an Informatica video tutorial which you can watch to learn it in a much better way.