The goal in jury selection is to strike bad jurors.
Many attorneys approach jury selection as an opportunity to seat jurors who favor their side. The problem with this approach is structural: jury selection is designed to remove unfavorable jurors, not to select favorable ones. On rare occasions, if opposing counsel is low on strikes, you may be able to use your strikes strategically to keep one or two favorable jurors, but that is the exception rather than the rule. Also if you identify good jurors that you want on your jury you will educate opposing counsel who to strike
Some try to “try the case” during jury selection. This violates the rules governing voir dire, and some attorneys view it as unethical. Judges and jurors will usually recognize what is happening, and it can damage your credibility before the case even begins.
Another ineffective tactic is to educate jurors about the law and issues in a way that will make them see the issues in your favor. The problem with this tactic is jurors are unlikely to change their minds after being questioned about an issue for 5 minutes.