It exists around your questing icon. It is made to display quest-line and it has been contained in different series names and it allows the player to locate the quest via resume button.

Contents 1 Rebirth [0] 1.1 Rich EXP quest series or best locations for level 70+: 2 Rebirth [1] 3 Rebirth [2] 4 Past Levels:

Rebirth [0]

Classic series carries is perfect EXP during level 50-60

Rich EXP quest series or best locations for level 70+:

Cultivation
Morai
Sage and demon
One thousand streams and burning lands

Rebirth [1]

Celestial Vale Or Perfect Quest Master during level 1-31
Oracles during level 31-70
Bounties + Phoenix Valley + Oracles during level 70-80
First reawakening quest-line series during level 80-90
Primal world quest-line series during 90-100

Rebirth [2]

Celestial Vale Or Perfect Quest Master during level 1-31
Oracles during level 31-70
Bounties + Phoenix Valley + Oracles during level 70-80
First reawakening Quest-line series during level 80-90
Discontinued Primal world Quest-line series during 90-100

Past Levels:

LV100 Bounties + Phoenix Valley [Sancturum]

More will be added to this post as the need calls for it.