Can you please explain to me what repport is and how to use it effectively. Please use examples.

Also if you have the best pickup line that does work then feel free to tell me.

There's no such thing as one line to pick up a girl. In Afrikaans there was one such line:
Naai jy of mors jy my tyd?
English translation of that would be: Do you fuck or are you just wasting my time?
This is cavemanning and when pulled of right, it might work.

Anyhow, building rapport is easily done if you match the other persons body language, voice tonality and overall state of mind. This is called Mirroring.

If you build up too much rapport and you both end up being in a low emotional state or whatever the case may be, you can break the rapport by doing a fun Kino Game or any other game which makes a person laugh. Google AFC Adam Lyons breaking rapport. He explains this extensively.

_________________
"Everything you do will be insignificant, but it is very important that you do it" - Gandhi

A standard cookie cutter opener would be "You're adorable, what's your name?" It's quick and to the point. May not always work though, but no line ALWAYS works.

Rapport is simply getting to know someone. But you want to build good rapport with someone, not bad rapport. Bad rapport would be like telling the person that you have an extensive criminal record and you are an atheist. If they are not a criminal and believe in god, sure they are getting to know you better, but they are not feeling a positive connection with you.

As you are talking with them and sharing experiences and biographical information, be looking for commonalities. Focus on those commanilities and cut any bad threads. Bad threads being subjects that are awkward, contentious, or negative.

Once you feel like you two have made a strong connection with rapport, then you break rapport. The reason for this is because you are basically trying to convey: "You thought we had a lot in common but actually it's not as much as you think, unless you can prove me wrong." It triggers her to begin chasing you and seeking your approval. An example of breaking rapport would be a hand throw, going off and talking to someone else, freezing her out, shit testing her, or disagreeing with her.

After that, when she starts chasing you, that's a great time to move into attraction building. She's ready to seek your validation and she'll be more receptive to physical contact like kino.

_________________
“Nothing is impossible, the word itself says 'I'm possible'!” ~Audrey Hepburn

Thank you so much, that made me understand what it is. It will definetly help me with pickup