sichten
to review
To look through, examine, and organize materials, documents, or information.
Vor dem Umzug müssen wir erst einmal alle alten Unterlagen sichten.
Before the move, we first have to review all the old documents.

to review / to sight
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to review
To look through, examine, and organize materials, documents, or information.
Vor dem Umzug müssen wir erst einmal alle alten Unterlagen sichten.
Before the move, we first have to review all the old documents.

'Sichten' (to review/to sight) is closely related to the noun 'die Sicht' (view/sight) and the adjective 'sichtbar' (visible). Both meanings are connected with seeing: either looking through material carefully or actually catching sight of something.
Nachdem er die Dokumente gesichtet hatte, hatte er eine bessere Sicht auf das Problem.
After he had reviewed the documents, he had a better view of the problem.
The object of the verb reveals the meaning. If it is a collection of things, e.g. 'Akten' (files) or 'Fotos' (photos), it means 'to examine'. If it is a single object in the distance, e.g. 'ein Schiff' (a ship) or 'die Küste' (the coast), it means 'to discover' or 'to sight'.
Ich muss noch die E-Mails von heute Morgen sichten.
I still have to review this morning's emails.
In the meaning 'to examine', 'sichten' (to review) almost always takes a plural object that represents a body of information. Typical objects are 'Unterlagen' (documents), 'Bewerbungen' (applications), 'Akten' (files), or 'Beweise' (evidence).
Die Personalabteilung sichtet gerade die eingegangenen Bewerbungen.
The HR department is currently reviewing the applications that have come in.
The meaning 'to discover' or 'to sight' is often used in specific contexts such as seafaring, aviation, the military, or animal observation. It describes catching sight of something important or expected.
Der Kapitän sichtete endlich Land am Horizont.
The captain finally sighted land on the horizon.
to see
'sehen' and 'sichten' can both mean that you perceive something with your eyes. 'sehen' is the normal general word for almost any everyday situation. 'sichten' is more specific. It can mean that you discover something from a distance or only briefly, for example a ship or an animal. It can also mean that you review and organize materials, photos, or documents. The words can be confused because 'sichten' often also starts with seeing. In everyday life, however, people usually say 'sehen'. 'sichten' is more suitable for observations, reports, or systematically looking through documents.

Am Abend sichtet das Team die Bewerbungen für den neuen Kurs.
In the evening, the team reviews the applications for the new course.
Auf dem Weg zur Schule sehe ich jeden Morgen denselben Hund.
On the way to school, I see the same dog every morning.