der Aspekt
aspect
A particular point of view, side, or feature of a thing, person, or problem.
Wir sollten auch den finanziellen Aspekt des Projekts berücksichtigen.
We should also take the financial aspect of the project into account.

aspect
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aspect
A particular point of view, side, or feature of a thing, person, or problem.
Wir sollten auch den finanziellen Aspekt des Projekts berücksichtigen.
We should also take the financial aspect of the project into account.

The main meaning 'Gesichtspunkt' (point of view / aspect) is very common. The meanings in grammar or astrology are technical language. You can recognize them by the fact that the text is about verbs and how actions unfold, or about planets and horoscopes.
Der perfektive Aspekt eines Verbs beschreibt eine abgeschlossene Handlung.
The perfective aspect of a verb describes a completed action.
'Aspekt' (aspect) is used mainly in more formal, written, or academic contexts. It helps to look at a topic in a structured way by dividing it into different parts or points of view.
In seiner Präsentation beleuchtete er die ökologischen Aspekte des Bauvorhabens.
In his presentation, he highlighted the ecological aspects of the construction project.
Common combinations are 'ein wichtiger Aspekt' (an important aspect), 'ein weiterer Aspekt' (another aspect), or a specific aspect such as 'der finanzielle/rechtliche/soziale Aspekt' (the financial/legal/social aspect). Typical verbs are 'einen Aspekt berücksichtigen' (to take an aspect into account), 'betrachten' (to consider), or 'vernachlässigen' (to neglect).
Bei der Entscheidung müssen wir alle wichtigen Aspekte berücksichtigen.
When making the decision, we have to take all important aspects into account.
A very typical construction is 'etwas unter einem bestimmten Aspekt betrachten' (to consider something from a particular aspect). The preposition 'unter' introduces the point of view from which something is evaluated.
Man kann das Problem unter verschiedenen Aspekten betrachten.
You can consider the problem from different aspects.
page / side
'die Seite' and 'der Aspekt' can both mean a particular part or viewpoint of something. In this sense, you might say 'eine positive Seite' (a positive side) or 'ein wichtiger Aspekt' (an important aspect), for example. 'Aspekt' sounds a bit more objective and fits well in conversations about topics, problems, or decisions. 'Seite' often sounds a bit more general and can also mean a quality of a person or situation. The words can be confused because neither refers to the whole thing, but only to one part of it. If you mean a point in an analysis or discussion, 'Aspekt' is usually more precise. If you are describing a quality or effect, 'Seite' often fits well.

Bei der Bewerbung ist der soziale Aspekt der Arbeit für Maria sehr wichtig.
For Maria, the social aspect of the work is very important when applying for the job.
Heute bespreche ich im Büro auch die gute Seite des neuen Plans.
Today at the office, I am also discussing the good side of the new plan.