Syncopation is when u accent notes that are usually unaccented. Accenting a note means u put more emphasis on the sound of that note from the other notes. Usually there is more finger pressure when u press that note down. Example:
4/4 time count
Regular
[1] C *accented
[2] C *unaccented
[3] C *accented
[4] C *unaccented
Sycopated
[1] C *unaccented
[2] C *accented
[3] C *unaccented
[4] C *accented
Syncopation also means adding in your own rhythms for the notes:
[1] C *unaccented
[2, 3] C *accented
[4] C *accented
[1,2] C *accented
[an] C *accented
[3, 4] C *accented
Is that clear enough for ya?