Question: what is the difference between ubuntu 18.04 lts and 19.10?
Answer: This means you can use Ubuntu 18.04 LTS with support until 2023. At the time of writing, Ubuntu 19.10 is set for release. However, like other non-LTS releases, Ubuntu 19.10 does not have the same level of support as Ubuntu 18.04. Updates will stop after two years, rather than the five on offer from an LTS.