What is SegWit Addresses:
In a nutshell it is an improvement over the current bitcoin blockchain which reduces the size needed to store transactions in a block. This is done by removing certain signature with counting serialised witness data as one unit and core block data as four units. The name stands for Segregated Witness.
Litecoin has recently updated the prefixes of their P2SH addresses that begin with a '3' to addresses that begin with an 'M.' This change was made to stop confusion between BTC and LTC's P2SH addresses, which used to be able to have the same '3' prefix. This does not affect all LTC addresses, as the 'L' prefix LTC legacy addresses (non-SegWit) will stay the same.
With both SegWit (Segregated Witness) and a Lightning network activated, Litecoin has the potential to scale far beyond anything Bitcoin is capable of at the moment. If you’re unfamiliar with what either a SegWit or Lightning network is, all you need to know is that they are technologies that enable cryptocurrency transactions to speed up while maintaining low transaction costs; hence, not only does Litecoin exchange hands faster than Bitcoin, but it also does this for a fraction of the cost, regardless of the number of transactions happening. All of these factors should influence any Litecoin price predictions for 2018.