Industry-Specific Backlink Acquisition

I am seeking an expert in SEO and backlinking with a specific focus on the painting services industry in Australia. My primary goal is to improve my search engine ranking through high-quality, industry-specific backlinks.

Can you confirm whether 'good authority' in the context of backlinks refers to blog posting, article submission, or the link itself? Also, please clarify if it excludes local directory links and social signals.