Received date Vs Priority date of I-485 application

[Apurba87]

Hi Expert,

Which date is more important to USCIS for start processing I-485 application for schedule interview? Received date or Priority date of I-485 application?
Received date of my I-485 application is Jun 20, 2018 but priority date is Dec 22, 2016.

Which I-485...

[bilal.pervaiz]

Here's my timeline and story of all the minor/major happenings during the period.

Timeline -
Priority Date : 4/3/2017
Receipt of Docs : 4/3/2017
concurrent apply
I-765
I-485
I-130

I-130 Online Status : Case was received 4/3/2017...