What job position / title should I get be getting for the role I play in the following company.?

I'm taking my family run business online, and I manage 100% of the technical side including the marketing and e-commerce.

The online side of it only uses the same company name and products. I don't have much of a role in the actual shop and I am free to do what I like with online side of it.

I wondered what my job title would be for something like my LinkedIn profile.
I've been told it could be CTO.

Any ideas?

Thanks in advance!