While working on a site audit, I wanted to be able to see what errors were currently happening on the site. I checked and they had dblog enabled already with a few days of errors, but going to admin/reports/dblog showed me pages full of the same error. This can happen when there is an error that occurs on a popular page or happens on every page load and it makes the logs difficult to read. In addition to that, the overview page truncates the error message and so you need to click through to the detail page to see the entire thing.