Learn to manipulate gene expression data from NCBI GEO using R and dplyr in this hands-on tutorial for bioinformatics beginners. Set up RStudio, read RNA-Seq data, retrieve metadata with GEOquery, and perform data manipulation using essential dplyr functions. Master techniques such as selecting, renaming, and mutating columns, reshaping data with gather(), joining datasets, filtering, grouping, summarizing, and arranging results. Follow along with provided code and resources to enhance your skills in analyzing genomic data efficiently.