The popularity of blog topics can vary over time and across different niches. Here are 20 popular blog topics that have consistently attracted a lot of readership and engagement:

Health and Wellness: Fitness tips, nutrition advice, mental health, yoga, meditation, healthy recipes, etc.

Personal Finance: Budgeting, saving money, investing, retirement planning, frugal living, etc.

Travel: Destination guides, travel tips, solo travel, adventure travel, budget travel, etc.

Lifestyle: Fashion, beauty, home decor, organization, minimalism, productivity, etc.

Technology: Tech reviews, software tutorials, gadget news, programming guides, cybersecurity, etc.

Food and Cooking: Recipes, cooking techniques, meal planning, restaurant reviews, dietary restrictions, etc.

Parenting: Parenting tips, child development, education, family activities, pregnancy, etc.

Self-Improvement: Personal development, goal setting, time management, confidence building, motivation, etc.

Relationships: Dating advice, marriage tips, communication skills, friendship, love, etc.

DIY and Crafts: Step-by-step tutorials for various crafts, DIY home projects, creative ideas, etc.

Business and Entrepreneurship: Startup advice, business strategies, marketing tips, leadership insights, etc.

Fitness and Exercise: Workout routines, fitness challenges, sports news, gym equipment reviews, etc.

Book and Movie Reviews: Analysis and opinions on books, movies, TV shows, and other forms of media.

Home Improvement: Renovation ideas, home maintenance tips, interior design inspiration, etc.

Gardening: Plant care guides, gardening techniques, landscaping ideas, urban gardening, etc.

Sustainability and Green Living: Eco-friendly practices, sustainable lifestyle tips, reducing carbon footprint, etc.

Art and Creativity: Art tutorials, creative inspiration, artist interviews, different art mediums, etc.

Career Development: Job search tips, resume writing, interview preparation, professional growth, etc.

Education: Educational resources, study tips, e-learning platforms, academic advice, educational technology, etc.

Motivational and Inspirational Content: Inspirational stories, quotes, success stories, personal anecdotes, etc.

Remember that the success of a blog depends not only on the topic but also on the quality of your content, your ability to connect with your audience, and your consistency in posting. Additionally, trends may have shifted since my last update, so it’s a good idea to do some research to identify the current popular blog topics in your specific niche or industry.