Here are some videos to explain, (they all teach the same thing)
- The BEST Anki Settings and Algorithm Explained (by an expert!) - YouTube (Most recent, focused for MED/University)
- Anki Settings: A Complete Guide and Recommended Settings For Medical School - YouTube
- Guide to Anki Intervals and Learning Steps - YouTube (Well explained, could have outdated info 4y old, good for language learners)