Concepts
Document vs row
- Capped collection
- Searching in text
- Nested and multi-fields indexes
- Aggregation API
- Map-reduce API
- Sharding and scaling out
And many more
Cloud implementation
Other attributes
- Open source
- Wrote in C++
- Query language in javascript
- Suport many software languages
- A very good dev experience
- Have a huge community
- Schemeless
- Doesn't support joins