Meditation conditions the body to become a conduit of Kundalini and is a very important activity that forms a basis of the expression or the Kundalini to enter into the human five body system.
For activation, meditation isn't the only way but it is a way that allows for an often subtle shift that can facilitate gradual changes that can begin to help an individual understand and experience direct action of the Kundalini upon the bodies.
Breathing meditations coupled with belief based systems of intent such as mantras or prayers can begin the introduction and compression of meditation applications towards an expression of Kundalini in a physical body. Following the breath with the mind and with the intention of going deep into one’s own core self can become the pathways towards an understanding and realization of the divine within us all.
And from this source will the other four bodies be conditioned and activated. Though the speed of the activation will differ from person to person, the expressive aspects of the Kundalini will none the less begin to emerge into the various areas of experience that will correlate to the specific body and its specific expression.
The physical body can have symptoms of energy rushing and tingling and sounds and visions and hearing, among a few of the symptoms, and at the very same time will the other bodies have expressions that are unique to them, i.e. powerful emotions, experience of direct knowledge or a "knowingness" that can come. Spiritual experiences as in religious personages being seen or felt or the action of being taken into the universe and combining with it into a singularity of creation.
Meditation can provide the basis for these actions to occur in ways that are helpful to the understanding of what a person as a Kundalini seeker is really trying to do - awaken the Kundalini.
Many types of meditation are appropriate, as well as many types of prayer. They can be an individual creation of yours or as part of a system, there is no hard and fast rule in what is to be an effective meditation for you. I will suggest that it is good to explore many of the options that call to you, even from areas that may seem unfamiliar as there may be other experiences of practices in your past that can be put to good use in your present time situation.
When you explore these options allow yourself to be lead and or introduced or re-introduced into these areas of practice. Let them guide you. I do suggest for Kundalini purposes that one use the breath for reaching into the surface of the inner landscape and then to combine and or follow that up by deeper methods that do not require the sole use of the breath but use it in tandem with other approaches.
These are only a few and illustrate the diversity of options that are present. With the Kundalini in mind I do enjoy Krishnamurti's thoughts on meditation as stated below.
Meditation isn't escapism. It is a doorway into knowledge and experience of the inner areas of your being. It is a two way reflection beyond the threshold of consciousness yet part of the consciousness at the same time. - blessings - chrism
..When you learn about yourself, watch yourself, watch the way you walk, how you eat, what you say, the gossip, the hate, the jealousy - if you are aware of all that in yourself, without any choice, that is part of meditation.