Are you talking about alt-tags or geo-tags? Because you should be doing both depending on the context.
Social SEO uses social media activity to improve your visibility in search engines, on the platforms themselves and on external search engines. It helps with discoverability and increase local engagement on platforms that allow users to search by location. As far as increasing your search ranking on Google, social media activity doesn’t directly impact it. However, if you are geotagged posts are widely shared or linked to and it increases your website traffic, it can have a small impact on search rankings.
I’d have to know more about your business, your audience, and your content strategy to really give you guidance on how effective it would be for you. Geotagging should be part of your social media strategy if you are a local business or in the travel or tourism industry (if you are a travel blogger, I’d say yes, definitely). It’s also helpful for event promotion, real estate agents, or a local influencer/content creator.
For traditional SEO, Alt-tagging will help you improve your website SEO, especially in image search. Not to mention it helps with accessibility, which search engines definitely look at when deciding how to rank websites. You would also want to use alt-text outside of your website on platforms like Substack, Medium, and LinkedIn (posts, newsletters and articles), as well as in email campaigns, e-learning platforms, PDFs, and social media ads.
A lot of people forget about alt-text. I see so many websites that don’t have alt-tags when I conduct content and SEO audits.