If you want to make your account and posts more discoverable:
-Fill in your profile, include website if you have one (with https:// at start)
-Describe yourself in first line of profile, this is shared by discovery systems
-Follow people
-Write public #Introduction, attach photos/audio/video if relevant
-Pin introduction to profile
-Use hashtags in posts
-Describe images
-On server, go to Edit Profile > Suggest Account To Others, tick box & save changes
More details at https://fedi.tips/how-do-i-get-more-followers-on-mastodon-and-the-fediverse/
What if we want to be less discoverable?
Don't do these things.
Instead, lock your account and set your default post visibility to followers-only. Also, don't use hashtags, and UNtick the box about "suggest account to others".
It means your post is more likely to be shared, as a lot of people will not share posts that have undescribed attachments.