Is it possible to change meta descriptions on Jobber hosted website?

Short answer: not per page, unfortunately. Jobber only gives you site-level control.

Go to Marketing → Website → More Actions → SEO and Discovery. https://secure.getjobber.com/website/seo You'll find Site Title (60 char limit) and Site Description (keep it under 150). That's it — one title and one description for the whole site. Your individual service pages get their meta auto-generated by Jobber, and there's no field in the editor to override them.

A couple of things that might help in the meantime:

1. Fix your business story. Marketing → Website, it's the 1000-character description Jobber uses to generate your page content. If it has the wrong locations or services in it, that's very likely where the bad meta is coming from. Update it, then republish.  

   https://secure.getjobber.com/settings/business_profile 

2. Rename the pages. Manage pages → gear icon → Page name. The URL slug updates with it, so at least your URLs are accurate.
3. Rewrite the on-page content — hero heading, subtitle, text sections. The auto-generated meta pulls from the page, so cleaning up the content is your best shot at the meta following along.
4. Republish and then request re-indexing in Google Search Console. Metadata changes can take days or weeks to show up otherwise.

Worth submitting this to Jobber support as a feature request too — per-page title and description fields are pretty standard, and the more people asking, the better.

One note on GBP: your meta descriptions don't actually affect your Google Business Profile ranking. That's driven by proximity, relevance, and prominence — reviews, categories, citations. Bad meta will hurt your click-through rate from organic search, which is worth fixing, but if your map pack rankings dropped, I'd look at your GBP itself first.