PRIMARY POINTS (most important) :
(smut)
Great cover
Bait title/summary
Story/plot/theme
high quality writing (talent/brain/experience)
anti-routine
Secondary points :
Characters, especially waifu
well done enemies if there are
fighting or not, the actions of MC that interest readers to read
the iq of characters, they must smart and not beta
anti-routine/cliches
(cliches are now boring, its better to write anti-routine like Konosuba or Deadpool, "A chest ALONE unguarded ? Fck i bet its a mimic" -> Burn it to death or torture by feeding shit hence getting revenge for all people or players of earth that suffered from mimics)
comedy is a nice spice
originality that differentiate from others
-------------------------
In short.
Like sex, what would women would prefer the man had: "handsome (cover/title/summary), longer (lot chaps), stronger (quality text), funny (comedy), sweet talking (romance/atmosphere vibes of plot), always present (not axed series), smart (protag AND enemies not being stupid), punctual (updates, and not disappear for 3months), talkative and can sympathize (interact with comments + can listen to advices of them + not being a D like a certain smurt author that insulted commenters that pointed typos and only caring for his PAID readers of own website), imaginative (ideas, like the bonus chapter of TRUE ENDGAME flashbacking MC playing a VRMMO space game and flying a gigantic space carrier worth months of game money and time to create, INTO THE SUN)"
Not saying to have ALL OF THEM
but "the more the better"
The man would be a chad, the series will be popular UNLESS UNLUCKY/environment
My brain run out of what are more
Edit : Oh and "faster"
Faster to move the body (to update)