Normal transactions VS. Internal transactions in etherscan
-->> accounts >> contract accounts >> selecting one contract,
There are two types of transactions mentioned under No Of Transactions:
Normal transactions and Internal transactions.
What is the difference between them and why are the Normal transactions usually much less than Internal transactions?
Internal transactions, despite the name (which isn't part of the yellowpaper; it's a convention people have settled on) aren't actual transactions, and aren't included directly in the blockchain; they're value transfers that were initiated by executing a contract.
Check these answers as well
nicksmac: Are internal transactions the events laid into the logs? Is that what they are?
@ThomasJayRush its `value transfers that were initiated by executing a contract.`