Generally, it's considered more formal and correct to write out "street" in full. This is especially true in formal writing, such as academic papers, business letters, or legal documents.
However, in informal writing, such as personal emails, text messages, or social media posts, it's perfectly acceptable to abbreviate "street" as "St."
Here's a breakdown:
Formal:
* 123 Main Street
* The shop is located on Elm Street.
Informal:
* Meet me at 456 Oak St.
* The bakery is on 789 Pine St.
Other factors to consider:
* Style guides: Some style guides, such as the Chicago Manual of Style, prefer "St." to be used only in addresses.
* Audience: Consider the expectations of your audience. If you're writing for a professional audience, it's usually best to write out "street" in full.
Ultimately, the decision of whether or not to abbreviate "street" is up to you. Choose the option that best fits the context and your audience.