no doubt about it; cempletely; totally; for sure; of course; naturally; in an expected way or order
can be used before, in middle, or at end of sentence, however you see fit.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

When something or someone is doing something to the MAX or to the T

to fully agree or understand

-the happiest thing that could happen in your phone (full battery)

-fully known;fully sure;etc

-full marks in tests;exams

in short, it reads across as ‘one-hundred percent’, meaing ‘the most’.

1)full effort; all; maximal exertion (as applying to a sport, usually)

2)completion (commonly of a particular RPG):
a in utterly the sumpremest, truest sense of the word;
or
b. virtually, or for intensive or practical purposes (can vary)

Note that that the second use of ‘100%’ can serve as many parts of speach simply by adding a different suffix.
{100% = completion to the fullest extent}
100%ly = adverb
100%'r or 100%er = person (noun)
100%'d or 100%ed = past-tense form of verb (usually transitive)
. . . and so on . . .

It is the very best it could be.