Usages of всё-таки
Я долго колебалась, но всё-таки записалась на курс.
I hesitated for a long time, but in the end I signed up for the course.
Мы долго искали ключ и всё-таки нашли его.
We looked for the key for a long time and in the end found it.
Elon.io is an online learning platform
We have an entire course teaching Russian grammar and vocabulary.