Machine Learning Reference

Top 20 ML Algorithms & Their Real-World Use Cases

A clean, professional single-page reference built from the shared infographic. Browse the most common machine learning algorithms, understand where each one fits, and quickly scan practical business and product use cases.

20 Algorithms covered
5 Model families
Finance to vision Real-world examples
Showing 20 algorithms
Tree-Based Linear & Regression Clustering & Similarity Probabilistic / Margin Dimensionality Reduction
Tree-Based

Random Forest

Ensemble learning for robust classification and regression.

RF
Use case

Predicting loan default risk in banking.

Linear & Regression

Logistic Regression

A baseline classifier for binary and multiclass prediction tasks.

LR
Use case

Classifying patients as high-risk for disease.

Tree-Based

Gradient Boosting (GBM)

Sequential boosting that improves performance by correcting prior errors.

GBM
Use case

Detecting fraudulent transactions in e-commerce.

Probabilistic / Margin

Support Vector Machines (SVM)

A margin-based method effective for structured classification problems.

SVM
Use case

Classifying handwritten digits in image datasets.

Clustering & Similarity

K-Nearest Neighbors (KNN)

A similarity-based method that predicts outcomes from nearby examples.

KNN
Use case

Recommending movies based on user preferences.

Tree-Based

XGBoost

A highly optimized boosting library known for speed and predictive power.

XGB
Use case

Winning machine learning competitions with faster, accurate predictions.

Tree-Based

Decision Trees

Interpretable models that split decisions into easy-to-follow rules.

DT
Use case

Determining customer eligibility for credit cards.

Probabilistic / Margin

Naive Bayes

A lightweight probabilistic model that works well on text-heavy problems.

NB
Use case

Email spam classification based on keyword probabilities.

Clustering & Similarity

K-Means Clustering

An unsupervised technique for partitioning data into natural groups.

KM
Use case

Grouping online shoppers by behavior patterns.

Linear & Regression

Linear Regression

A core regression method for understanding and forecasting numeric outcomes.

LIN
Use case

Forecasting monthly sales in retail.

Tree-Based

AdaBoost

A boosting approach that combines weak learners into a stronger predictor.

ADA
Use case

Enhancing performance in face recognition tasks.

Tree-Based

LightGBM

A fast gradient boosting framework designed for scale and efficiency.

LGB
Use case

Accelerating model training on large datasets.

Tree-Based

CatBoost

Boosting optimized for tabular data with strong handling of categorical variables.

CAT
Use case

Handling categorical features in business applications.

Linear & Regression

Ridge Regression

Regularized regression that improves stability when predictors overlap.

RR
Use case

Handling collinear variables in housing price models.

Linear & Regression

Lasso Regression

Regularized regression that helps select the most important predictors.

LAS
Use case

Selecting most relevant predictors in marketing data.

Clustering & Similarity

DBSCAN (Clustering)

Density-based clustering that handles noise and irregular cluster shapes.

DB
Use case

Detecting anomalies in network traffic.

Dimensionality Reduction

PCA (Principal Component Analysis)

A dimensionality reduction technique for compressing and simplifying feature space.

PCA
Use case

Reducing feature space for image compression.

Clustering & Similarity

Hierarchical Clustering

A clustering method that reveals nested relationships between groups.

HC
Use case

Building family trees of similar customer behaviors.

Linear & Regression

Polynomial Regression

A regression approach for modeling curved relationships in data.

PR
Use case

Modeling growth curves in scientific experiments.

Linear & Regression

Stochastic Gradient Descent (SGD)

An optimization workhorse for training models efficiently at scale.

SGD
Use case

Training large-scale linear classifiers efficiently.