MySQL Database error message help needed please

[angelicdezigns]

Good Evening,

I have just discovered my ‘local host/phpmyadmin 2.8.0.3, in my MySQL Databases control panel (finally lol) and then clicked ‘manage now’ in Delete/Edit/Manage a MySQL Database, a new browser opened with phpmyadmin, with the following error message in a yellow box, and I have absolutely no idea what it means.

The mbstring PHP extension was not found and you seem to be using a multibyte charset. Without the mbstring extension phpMyAdmin is unable to split strings correctly and it may result in unexpected results.

Could someone please explain in 'newbie' terms what this means, and how I would go about rectifying it.

Thank you for your help
Kind Regards
Nikki

Also, under the database drop down selection on the left hand side of my phpmyadmin I have got 2 different databases one with (16) after the name and the other with (93) after the name, I only have one website, so am confused why there are 2 databases.