Oh dont get me wrong I love my 3DS, but it has been taken over by morons who dont understand the concept of 'no cia installer for 9.3+' and ask pointless questions about it. The 3DS scene is diabolical, ask anyone who frequents there. Theyll say the same thing
Its fine! Just a pre-warning so you dont become a part of the 3DS Scene infection. A CIA installer is used to install .cia files onto a 9.2 or lower 3DS system. They are roms that are installed to the 3DS, and appear on the home menu, akin to say downloading one from the eShop