Question: what are the data visualization techniques?
Answer: Bar Chart. Bar charts are used for comparing the quantities of different categories or groups. ... 
Pie and Donut Charts. ... 
Histogram Plot. ... 
Scatter Plot. ... 
Visualizing Big Data. ... 
Box and Whisker Plot for Large Data. ... 
Word Clouds and Network Diagrams for Unstructured Data. ... 
Correlation Matrices.