woher
where from
Used as a question word to ask about the origin, provenance, or source of something or someone.
Woher weißt du das alles?
Where do you know all that from?

where from
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where from
Used as a question word to ask about the origin, provenance, or source of something or someone.
Woher weißt du das alles?
Where do you know all that from?

'Woher' (where from) is a combination of 'wo' (where/place) and 'her' (movement away from a place, toward the speaker). So it always asks about origin or provenance.
Woher hast du diese schöne Jacke?
Where did you get this beautiful jacket?
Word order depends on the type of sentence. In a direct question, the conjugated verb comes directly after 'woher' (where from). In a subordinate clause (e.g., in an indirect question), the conjugated verb comes at the end.
Woher kommt diese Musik?
Where is this music coming from?
As a question word, 'woher' (where from) is very often used with the verbs 'kommen' (to come), 'wissen' (to know), and 'haben' (to have) to ask about origin, source of information, or where something was obtained.
Woher kennst du meinen Bruder?
How do you know my brother?
where
'wo' and 'woher' both have to do with places, but they do not ask about the same thing. 'wo' asks about the place where someone or something is. 'woher' asks about the origin, background, or source. So you can ask: 'Wo bist du?' (Where are you?) and 'Woher kommst du?' (Where do you come from?). The first asks about the current location; the second asks about the starting point. These words are often confused because they look similar and both give information about place.

Emma fragt den Techniker, woher die lauten Geräusche im Computer kommen.
Emma asks the technician where the loud noises in the computer are coming from.
Wo ist der Laden, in dem du die Schuhe kaufen willst?
Where is the shop where you want to buy the shoes?