Used by a company to refer to itself in formal or business contexts. Can also mean 'this company' when pointing to a specific firm.
Our company is a long-established firm founded 100 years ago.
Our company's products are sold all over the world.
this shrine
Used by a shrine to refer to itself in formal announcements or publications. Less common than the company sense.
This shrine is crowded with many worshippers every year.
Cars made by our company are sold all over the world.
Please contact our company for more details.
I would like to express our thanks on behalf of our company.
当社 is a neutral or slightly formal way to say 'our company' usable both internally and externally, while 弊社 is explicitly humble and reserved for speaking to outsiders.
当店 is used by staff to refer to their own physical shop, while 当社 is the parallel term used to refer to one's own company or business.
compared to our company's products; in-house comparison · as I see it; by my estimate
Compound of 当 (this, the present) and 社 (company, shrine). The reading とうしゃ is the on'yomi of both characters.