vorig
previous
Describes something that immediately came before in a chronological or spatial sequence.
Voriges Jahr haben wir unseren Urlaub in den Bergen verbracht.
Last year, we spent our vacation in the mountains.

previous
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previous
Describes something that immediately came before in a chronological or spatial sequence.
Voriges Jahr haben wir unseren Urlaub in den Bergen verbracht.
Last year, we spent our vacation in the mountains.

The adjective 'vorig' (previous) is directly related to the preposition 'vor' (before / in front of). This connection helps make the meaning 'preceding' or 'last' easy to understand and remember.
Ich habe ihn vorigen Dienstag das letzte Mal gesehen.
I saw him for the last time last Tuesday.
'Vorig' (previous) is used almost exclusively with time expressions. The most common combinations are 'vorige Woche' (last week), 'voriger Monat' (last month), and 'voriges Jahr' (last year).
Vorigen Monat war ich im Urlaub.
Last month I was on vacation.
'Vorig' (previous) is an attributive adjective. That means it always stands directly before a noun and is declined accordingly. It cannot be used by itself at the end of a sentence.
Die Ergebnisse des vorigen Quartals waren sehr gut.
The results of the previous quarter were very good.
last
'letzt' and 'vorig' can be very similar when they mean the directly preceding time or period. For example, you can say 'letzte Woche' (last week) and 'vorige Woche' (the previous week / last week). 'letzt' is usually more natural and more common in everyday language. 'vorig' sounds a little more formal or written, but it is correct in many time expressions. Important: here this is not about 'letzt' meaning the end of a series, but about the meaning 'directly before'.

Die vorige Seite erklärt die Regel mit einem einfachen Beispiel.
Jana is reading the previous page again today because she did not understand the text.
Letztes Jahr war meine Familie im Sommer am Meer.
Last year, my family was by the sea in the summer.