The main goal is that you want to stay top-of-mind of potential clients. You can do this by providing easy-to-digest bits of information that provide value.
When I started my business, I was given this same advice, and I ignored it. I didn't follow it because I came from the agency model in which invoices were sent and followed up on. I didn't know anything else. Even after months of chasing multiple clients for payment, changing this policy was really hard for me. I was dumb for wasting so much time and effort to get money that was technically mine.
Don't make the same mistakes I did.
I get it, you're struggling and looking for clients anywhere you can find them. Even if you're not struggling, it takes a gargantuan amount of force for most of us to have the courage to say "no" to a paying client.
But you have to say "no."
Saying "no" to clients not only puts energy out into the universe that you are committed to working with and helping a specific type of client, but it just makes business sense.