This is precisely the audience the product is designed for. The manufacturer names two typical situations: adults who rarely eat oily sea fish (salmon, mackerel, herring, sardines), and those who follow a more plant-based diet.
Some context on why this matters: the modern diet tends to be rich in omega-6 sources — sunflower and rapeseed oil, processed foods — while oily fish appears on the plate infrequently. Plant foods do contain an omega-3 called ALA (found in flaxseed, walnuts and similar sources), but the human body converts ALA into EPA and DHA only to a limited extent. Fish oil provides EPA and DHA directly, in the ready-to-use form, which is why people on fish-poor diets often choose it.
One important caveat for vegetarians and vegans: both the fish oil itself and the soft capsule shell are of animal origin (the shell is gelatin). If you avoid all animal products, this product will not fit your diet — algae-based DHA/EPA supplements would be the category to look at instead. People with a fish allergy should not take it, and should speak with a doctor or pharmacist about alternatives.
Finally, a supplement complements the diet but does not replace it — if you can add oily fish to your meals even occasionally, that remains a valuable food source in its own right.