Only if you will sustain it.
THE HONEST QUESTION
Will you publish consistently for at least a year?
If not, do not create one. An abandoned blog with a last post from 2021 signals a neglected business, which is worse than having no blog.
IF YOU WILL
Publish on a schedule you can sustain. Once a month, indefinitely, beats ten posts and silence.
WHAT TO WRITE ABOUT
Questions customers ask Practical guidance in your field Explanations of things customers find confusing Local information relevant to your work
WHAT NOT TO WRITE ABOUT
Company news nobody searches for Generic industry commentary Anything written because you needed to publish something
MAINTAINING IT
Update older posts that are still accurate but out of date Remove or update anything wrong Check that old posts still reflect your current services and prices
IF YOU HAVE ALREADY ABANDONED ONE
Either restart it, or remove the dates so the neglect is less visible, or remove the section entirely.
THE ALTERNATIVE
A frequently asked questions page, which serves a similar purpose and does not imply a publishing schedule.