I am currently running Ubuntu MATE 18.04 on an ASUS x550A and recently read 18.10 has reached EOL, does this mean I need to upgrade and if so to what do I upgrade? I ran Software Upgrader and the System Monitor > System tab still shows 18.04.2
Any help and advice will be really appreciated as I am very much the novice. Hal.
Your Ubuntu-MATE 18.04 LTS release has plenty of life left.
Ubuntu-MATE 18.04 LTS is a long-term-support release, with 3 years of support starting with it's release in April 2018 (releases a yy.mm in format), so your support ends in April 2021.
The main Ubuntu 18.04 LTS has five years, but flavors come with 3 years of support. Only the first (April) release in a even year is LTS (ie. 14.04 LTS, 16.04 LTS, 18.04 LTS, 20.04 LTS), the normal releases have shorter 9 months of support life.
https://wiki.ubuntu.com/BionicBeaver/ReleaseNotes