"Entry Type" in Journal Entry -- what's it for?

Hello,

What is the function of “Entry Type” when doing a journal entry? Is it just for filtering?

The default is “Journal Entry”, but there is also “Depreciation Entry”, “Credit Card Entry”, etc…how are these functions used, if at all?

Hello,
The entry type in Journal entry allows to make account specific entries. Refer the link to learn more on the same.
https://erpnext.org/docs/user/manual/en/accounts/journal-entry

Hope this helps.