hi anyone kind enough to explain this
Iota does not seek to replace the blockchain entirely, it also acts as a supplementation to the current blockchain ecosystem by acting as a oracle for smart contract platforms like Ethereum and Rootstock. Additionally it increases security of blockchains by enabling the ability to include checkpoints for transactions.
cant understand how this acts as an "oracle"
For instance, a sensor can run IOTA. The outside real time data collected by a sensor such as weather or vehicle data can be stored in Tangle which is IOTA's distributed ledger and transferred through IOTA to other systems like Ethereum and Rootstock. All you need is an interoperable bridge between systems. Basically it means that IOTA can feed immutable data to Ethereum and Rootstock in the place where Ethereum and Rootstock are not able to operate and collect data.