Paul writes this letter to Titus in Crete. In three chapters (as divided by modern men in the church in the Bible Kin James Version), he describes the characteristics of Church Leaders that Titus, and all churches, should follow in choosing church leaders.
He reminds Titus that there is a specific reason that he, Paul, has placed him in the church in Crete is so that he may set in order the matters of that church and appoint elders in all the cities and churches.
Paul specifically describes the characteristics that every elder must have: to be above reproach for his actions and way of living, to have only one wife (apparently not be divorced) , not self-willed but open to others, not be quick-tempered, not addicted to wine/alcohol, not pugnacious or happy about financial gain. That the elder/overseer must be hospitable, loving what is good, sensible, just devout, self controlled, and hold fast to the word of God so that he is able to teach and preach.
About false teachers and deceivers of the believers in the churches, Paul says that they profess to know god but by their deeds, they deny him, being detestable and disobedient and worthless for any good deed.
Paul says that both the older men and women must be reverent in their behavior…not malicious gossips (as if only women spread bad words about others) and not addicted to wine/alcohol, they teach what is good, encourage the young woment to love their husbands and their children. He tells Titus to urge the young men to be sensible. (in this and other letters to churches, Paul is much harsher and demanding what women should be expected to do.)
Paul even says that slaves must be subject to their masters in everything, to be well pleasing and not argumentative, never steal from their masters; then he tells the slaves to love and have faith in God. (these references in Paul’s letters have been used by many to justify slavery in the era since Paul wrote the words.)
He ends the letter by encouraging that Titus and the people of the churches in Crete to live godly. In memorable words, he speaks of Christ’s love for humanity, saved us (including Paul and the churches he led to establish)
He continued as his benediction that Jesus saved us not on the basis of deeds which we have done in righteousness, but according to His mercy---by the renewal of the Holy Spirit who was poured out upon believers (Acts 2 at a time called Pentecost) richly through Jesus, the Christ and Savior.