tylersprayman@gmail.com

Just inherited a site from a client and it has these id codes after certain file names in the code. I have seen id's like these before but never had to deal with them until now. What are they, how are they generated, why do i need them, do they need to be changed? Also is css3366.css a specific typer of css file or is that simply what they named it? Thanks <link href="/theme/css/css3366.css?v=pldtNfMEx3LMrpYxMzy5kHd8Nj9-crskSwf8XfFY1L95M1" rel="stylesheet"/> <script src="theme/modernizr6a4a?v=swfNR4I2pQwaJaYcnJKzgszzHI4XiJFBRh85GNOpQ1"></script> <script src="theme/core7491?v=fbghb-nYUaHTaXmV7S2R3L9lBSsbR55ed4am7zYKTGM1"></script> <script src="theme/val0afa?v=vmrtfkiL2Z90AUp5Gi6ez5WZrJN9rUNzMngdnJaAqtD16g1"></script> <script src="theme/custom90f8?v=kvtydeDI85AzbxW9vscIznBXvh1RAI8xRtta9VsEFIOzs1"></script>