In Jira, there is a basic editor, but you can choopse between visual or text editors.
Tables are in the format of:
||Header 1||Header2 |||Content1| Content2||Content 1a| Content2a|
This is handy to know so you can use PowerShell to query data and output it in this way to nbe easiluy pasted into a Jira comment field.
While not exactly markdown, Jira does support using
for crosses and
for ticks. Useful to know.