fad
bland
Without flavor or with too little seasoning; tasteless.
Die Suppe schmeckt etwas fad, es fehlt Salz.
The soup tastes a bit bland; it needs salt.

bland / boring
Loading your saved state.
bland
Without flavor or with too little seasoning; tasteless.
Die Suppe schmeckt etwas fad, es fehlt Salz.
The soup tastes a bit bland; it needs salt.

The expression 'einen faden Beigeschmack haben' (to leave a bad/strange aftertaste) is often used metaphorically. It means that an actually good situation leaves behind an unclear, negative feeling.
Sein plötzlicher Rücktritt hinterließ einen faden Beigeschmack.
His sudden resignation left a bad aftertaste.
When referring to taste, 'fad' (bland) is often combined with the verb 'schmecken' (to taste). It describes food that lacks seasoning, especially salt.
Das Gemüse schmeckt fad, du solltest es mehr würzen.
The vegetables taste bland; you should season them more.
You can tell whether 'fad' means bland or boring from the noun. If it refers to food or drink, it is about taste. If it refers to an activity, person, or idea (e.g., party, film, joke), it means 'boring.'
Die Suppe war fad, aber der Film am Abend war noch fader.
The soup was bland, but the film that evening was even more boring.
In the meaning 'boring,' 'fad' can also describe something weak, unimaginative, or unconvincing. A 'fade Ausrede' (weak excuse), for example, is a poor, unbelievable excuse.
Das war nur eine fade Ausrede, um nicht mitkommen zu müssen.
That was just a weak excuse to avoid having to come along.
interesting
'interessant' and 'fad' form a contrast here. 'interessant' says that something arouses attention or curiosity. In this context, 'fad' means boring and without appeal. 'interessant' fits when you want to know more or keep listening. 'fad' fits when something seems monotonous and has no suspense or excitement. Important: 'fad' can also mean 'without flavor' when talking about food, but this comparison is about boredom.

Laura findet den Film fad, weil fast nichts passiert.
Laura finds the film boring because almost nothing happens.
Morgen hören wir in der Schule einen interessanten Vortrag über das Klima.
Tomorrow at school, we will listen to an interesting talk about the climate.