This video will explain how to get started with seed tracking, and also on how to use the website that hosts the seed tracks.

Link to the website: https://bc.godfat.org/

Seed tracking facts:
Your seed stays with your account forever.
You only need to find out your seed once (unless you somehow lose it).
Progress on the tracks is shared across all premium banners (Premium Gacha, Platinum Tickets, Legend Tickets).
The only way to switch tracks is by rolling a multi that guarantees an Uber unit, or when the track is made to avoid rolling 2 of the same unit in a row.
The only way to bypass a track switch is by rolling a Platinum Ticket or Legend Ticket on one of the duplicate cells.
All cells have a designated rarity to them that is shared across all banners (some exceptions are Uber/Epic Fest banners with increased Uber/Legend unit rates).
Uber/Epic Fest banner results change, with every new run.
Platinum and Legend banner results change, whenever a new Uber unit is added to the pool.
Give the seed tracking website a few days to update its security certificate when it expires (happens every couple of months or so).