A martech stack is the collection of technologies that marketers use to optimize and arrange their marketing processes throughout the customer lifecycle. You can start building a stack by first defining your needs and identifying them. You may also run an audit for the same purpose. Onve you identify them then develop a list of requirements and accordingly plan your technology needs. To get a better understanding you can perform a gap analysis. Once you are done with all the previous steps then finally you can get to its implementation. Make sure that the martech stack is laid out in a format that makes sense, works intuitively, and facilitates an improved customer experience.