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Prepositions after verbs

Blog about, for, in, on or by

Blog about and blog on are both used for topics. Other prepositions often introduce purpose, language, platform, or author rather than fixed verb patterns.

Quick answer

Use blog about or blog on for topics

Use blog about or blog on to introduce the subject of a post. About is more conversational and common. Other prepositions usually express separate details such as audience, language, or author.

She blogs about sustainable travel.
He blogged on digital privacy.
They blog about home cooking.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
blog about + topic

Writing about a subject

Use about to introduce the main topic of blog content.

I blog about language learning.
She blogs about city life.
2
blog on + topic

Discussing a topic in a slightly more formal style

On is also natural for topics, especially in formal or professional contexts.

He blogged on climate policy.
Experts blog on cybersecurity issues.
3
blog in + language

Naming the language used

Use in to mention the language or style of writing.

She blogs in Spanish.
The site blogs in simple English.
4
blog for + audience or organisation

Showing who receives the content

Use for to show the intended audience or company.

He blogs for a technology magazine.
They blog for small business owners.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
blog about
She blogs about gardening.
standard and common for topics
blog for
He blogs for a travel company.
shows the organisation or audience
blog in
They blog in French.
shows language or style
blog on
The professor blogs on economics.
another standard way to introduce a topic
blog by
A blog by local students gained attention.
by usually identifies the author, not a fixed verb-preposition pattern

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using by after the verb for a topic

Use about or on for subjects.

✕ She blogs by fashion trends. ✓ She blogs about fashion trends.

Confusing for and about

For introduces the audience or employer, not the topic.

✕ He blogs for technology. ✓ He blogs about technology.

Using in for topics

In usually refers to language or style.

✕ They blog in politics. ✓ They blog about politics.

Quick practice

Choose the expression that matches the intended meaning.

1. She blogs ___ healthy eating.
2. The journalist blogs ___ a national newspaper.
3. He blogs ___ German.

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Frequently asked questions

Is blog on correct?

Yes. Blog on is a natural alternative to blog about, especially in more formal contexts.

Can blog by be correct?

By is usually used with the noun blog to identify the author, as in a blog by Maria.

Which is more common: blog about or blog on?

Blog about is generally more conversational and widely used.

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