I saw this on FamilySearch recently – Irish Genealogy: Finding Birth, Marriage, and Death Records: https://www.familysearch.org/blog/en/irish-bmds-genealogy/. Article is longer, but here are some details. I included the section headings below.
February 19, 2021 by Sunny Morton
When you are exploring the lives of your Irish ancestors, a top priority is finding records of their births, marriages, and deaths, also called BMDs or vital records. These kinds of records help you confirm your relatives’ identities, where and when they lived, and the identities of their nearest kin.
The most important source of your Irish ancestors’ BMDs for the past 150 years or more are civil registrations. Fortunately, civil registration information for millions of people is available online—much of it for free. Here’s where to look for Irish civil registration records and what you’re likely to find.
Irish Civil Registration: BMDs since 1864
Irish Birth Registrations
Irish Marriage Registrations
Irish Death Registrations
Beyond Irish Civil Registrations: More BMDs