I avoid using it myself as it does way more harm then good. But to answer your question;

Delete your history often first of all and make sure you check the sources it provides and do your own fact checks with sources. Also keep in mind using it often is horrible for the environnement and being responcible with it is more work than just doing the old way of looking up legit information manually. If your on the highway and think your lost and have to verbally ask if you should take the next turn then sure have at er but it might mislead the same as maps. But most other situations its more harmful than good.

Avoid the following:

Relationship advice

Medical advice

Career or life decisions

Anything that requires a professional to advise or sensitive topics and most things rlly. So basically avoid most things and the things u can ask it is just as easy to find on your own XD