Hey @Leish2326, are you receiving a similar MMS or the exact same MMS as the original poster? We'll never send out this sort of MMS. The easiest way to tell if a link is genuine is by the country code top-level domain. Now the MMS the OP received contains .ga. This is the country code top-level domain for Gabon; a country on the West coast of Africa. This isn't something that we'd sent out. They've deceptively included Optus in their domain name.
These types of malicious MMS messages are generally phishing scams intended to obtain personal or sensitive information. If you're not sure if the links authenticity, we suggest that you simply delete the message.