der Fokus
focus
The center of attention or interest.
In diesem Seminar liegt der Fokus auf praktischen Übungen.
In this seminar, the focus is on practical exercises.

focus
Loading your saved state.
focus
The center of attention or interest.
In diesem Seminar liegt der Fokus auf praktischen Übungen.
In this seminar, the focus is on practical exercises.

There are two important patterns: 'Der Fokus liegt auf' + dative describes the state. 'Den Fokus legen auf' + accusative describes the action of directing attention.
Der Fokus liegt auf der Sicherheit der Mitarbeiter.
The focus is on the safety of the employees.
'Fokus' (focus) is a very common word in business and educational language for naming priorities or areas of emphasis.
Der Fokus dieses Quartals liegt auf der Kundenzufriedenheit.
The focus of this quarter is on customer satisfaction.
Common expressions are 'im Fokus stehen' (to be in focus / to be important and receive attention) and 'etwas in den Fokus rücken' (to bring something into focus / make something important).
Das Thema Umweltschutz steht immer mehr im Fokus der Öffentlichkeit.
The topic of environmental protection is increasingly in the focus of the public.
The optical meaning is used almost exclusively in technical contexts such as photography or physics. Typical verbs here are 'einstellen' (to set/adjust) or 'justieren' (to adjust).
Für ein scharfes Porträt muss man den Fokus genau auf die Augen legen.
For a sharp portrait, you have to place the focus precisely on the eyes.
center
'das Zentrum' and 'der Fokus' can both mean that something is especially important or receives a lot of attention. 'Im Zentrum stehen' more often describes that a topic, a person, or a problem is the most important point. 'Fokus' emphasizes active attention more strongly: you deliberately direct your gaze or your work toward something. Learners may confuse the words because both have to do with attention. As a simple guide: something is 'im Zentrum' when it is important; something is 'im Fokus' when you are currently concentrating especially on it.

Heute liegt mein Fokus bei der Arbeit auf dem neuen Bericht.
Today, my focus at work is on the new report.
In der Diskussion stand die Frage nach bezahlbaren Wohnungen im Zentrum.
In the discussion, the question of affordable housing was central.