Update README.md

Author: vrmiguel

README.md

@@ -8,6 +8,38 @@
 
 <img align="center" width="1624" height="1056" alt="image" src="https://github.com/user-attachments/assets/fecbe1e2-d0a5-46cc-8843-78b25a509a3f" />
 
+### What is it?
+
+* A lightweight, snappy tool for everyday queries
+    * Quick startup: loads up in less than a second in my machine.
+    * Small memory footprint
+    * Small bundle size
+* Most importantly, pgpad is _free_, and will always be. That includes not ever having a "Community Edition", pop-ups that ask you for an upgrade, or anything of the sort.
+
+### What is it _not_?
+
+* A fully-fledged professional DB management system like DBeaver.
+
+### Supported databases
+
+|       Database       |        Status         |                                                         Note                                                          |                                         Driver                                          |
+|:--------------------:|:---------------------:|:---------------------------------------------------------------------------------------------------------------------:|:---------------------------------------------------------------------------------------:|
+|      PostgreSQL      | Implemented, primary  |                                    Implemented, most used by authors. Unit-tested.                                    |           [`tokio-postgres`](https://github.com/rust-postgres/rust-postgres)            |
+|        SQLite        |      Implemented      |                                               Implemented, unit-tested.                                               |                   [`rusqlite`](https://github.com/rusqlite/rusqlite)                    |
+|     CockroachDB      |      Implemented      |                Implemented due to the Postgres Wire Protocol. No CockroachDB-specific tests currently                 |           [`tokio-postgres`](https://github.com/rust-postgres/rust-postgres)            |
+|        MySQL         |        Planned        |                                                                                                                       |                                           das                                           |
+| Microsoft SQL Server |        Planned        |                                                                                                                       |                                                                                         |
+|        Oracle        |        Planned        |                                                                                                                       |                [`mysql`](https://github.com/blackbeam/rust-mysql-simple)                |
+|      Clickhouse      |        Planned        |                                                                                                                       |               [`clickhouse`](https://github.com/ClickHouse/clickhouse-rs)               |
+|      SQLCipher       |        Planned        |                                                                                                                       |                   [`rusqlite`](https://github.com/rusqlite/rusqlite)                    |
+|        DuckDB        |        Planned        |                                                                                                                       | [`duckdb`]([https://github.com/rusqlite/rusqlite](https://github.com/duckdb/duckdb-rs)) |
+|       MongoDB        | Not currently planned |                                Would require some refactors to accomodate a NoSQL DBMS                                |                                                                                         |
+|       MariaDB        |                       | Rust lacks a dedicated MariaDB driver. As it stands, we'd be able to support MariaDB only through MySQL compatibility |                                                                                         |
+
+#### Operating systems
+
+`pgpad` supports Windows (7+), macOS (10.15+), and Linux (must have `libwebkit2gtk` 4.1 or higher).
+
 ## Building
 
 ### Requirements