It actually looks like a typo as the sentences reads much more logically as "It's not essential, but ... "
FWIW I keep checking in on the Bullet Journal blog once a year or so to get some ideas, but I started keeping a variant of Bullet Journal about 5 years ago.
It's definitely been useful for not forgetting upcoming events, reflecting on the last month and for tracking trends on events in my life (e.g. sporadic food logging when making more of an effort to lose weight). One of the most positive outcomes was from recording key details about events - e.g. if I've met someone new at a language exchange, jot down their name and a detail or two about them. I found just re-reading these notes a day before I'm likely to encounter someone again has massively helped the next interaction because I'm not just going "Oh, what's your name again?"
FWIW I keep checking in on the Bullet Journal blog once a year or so to get some ideas, but I started keeping a variant of Bullet Journal about 5 years ago.
It's definitely been useful for not forgetting upcoming events, reflecting on the last month and for tracking trends on events in my life (e.g. sporadic food logging when making more of an effort to lose weight). One of the most positive outcomes was from recording key details about events - e.g. if I've met someone new at a language exchange, jot down their name and a detail or two about them. I found just re-reading these notes a day before I'm likely to encounter someone again has massively helped the next interaction because I'm not just going "Oh, what's your name again?"