How to vectorize text columns using Sci-kit learn?

I’m working on a project related to sentimental analysis. For this purpose, I have to convert my text data into numerical features that machine learning algorithms can understand and analyze. I have learned that ColumnTransformer can vectorize two text columns in various ways. I have found one method that works fine but I believe that there are some other ways experts in this field know. Can someone help me with available ways of doing vectorization?
Here’s a way, I found of doing vectorization: