If you don't feel like you have time to spend a lot of time on Steemit, or you want to maximize your profit from your own SP, Delegating a voting bot would probably be the best choice.
How does bidding bot work?
A bidding bot lets users send SBD and get equivalent(or higher) value of upvote for exchange. Now lots of people use voting bots to promote their content, so it has become harder for you to earn profit by just bidding.(it's now almost impossible for you to spend only 1 SBD and get like $10 upvotes because all users can check this website https://steembottracker.com/ for bot information). That means, bidding bots are now just for post promotion, you can't profit from it anymore.
Why Delegating your SP to voting bots?
So now, delegating Steem Power to voting bots becomes extremely profitable, because too many users are trying to promote their content with these bots, so It's very likely that they will pay more than the equivalent value of SBD for upvotes.
If you go to steembottracker.com and view details of all the bots, you will see that the ROIs are usually negative:
This post has received a 4.22 % upvote from @boomerang.
Your post very interesting, thank you for the information @bidseption