Learn Finnish: Tämä palvelu räätälöityy hyvin, sillä se kerää dataa. - This service becomes tailored well, for it collects data.

It is derived from the noun räätäli (tailor). By adding the automative suffix -öityä, it becomes a verb describing an automatic process meaning to become tailored or to adapt. The y at the end is the regular third-person singular present tense ending.

What is the difference in meaning between räätälöityä and räätälöidä?

Räätälöidä is a transitive verb meaning to tailor something; it requires an active subject, like a programmer customizing a system. Räätälöityä, with its -öityä suffix, is intransitive and automative. It means the subject (the service) adapts or becomes tailored on its own.

Why is the conjunction sillä used here instead of the more common koska?

Both mean because or for, and they are largely interchangeable here. However, sillä is a coordinating conjunction, making it slightly more formal or written-style than koska. You will often see sillä in professional contexts like this one describing software.

Why is the loanword data in the partitive case (dataa)?

The verb kerätä (to collect) takes a partitive object when the action is ongoing or the quantity is undefined. Here, the service is continuously collecting an unspecified, open-ended amount of data, which triggers the partitive ending -a.