What does Titus 1:4 mean?

Paul, a servant of God, and an apostle of Jesus Christ, according to the faith of God’s chosen ones, and the knowledge of the truth which is according to godliness,

in hope of eternal life, which God, who can’t lie, promised before time began;

but in his own time revealed his word in the message with which I was entrusted according to the commandment of God our Savior;

I left you in Crete for this reason, that you would set in order the things that were lacking, and appoint elders in every city, as I directed you;

if anyone is blameless, the husband of one wife, having children who believe, who are not accused of loose or unruly behavior.

For the overseer must be blameless, as God’s steward; not self-pleasing, not easily angered, not given to wine, not violent, not greedy for dishonest gain;