Several Shopify apps can help improve your store's SEO. Some popular ones include:

1. SEO Manager: This app helps optimize your store's content, meta tags, and image alt text for better search engine rankings. It also provides insights and recommendations for improving SEO performance.

2. Plug in SEO: Plug in SEO automatically checks your store for SEO issues and provides actionable recommendations to fix them. It helps optimize meta titles, descriptions, headings, and image alt tags.

3. SEO Image Optimizer: This app optimizes your store's images for search engines by automatically generating SEO-friendly alt text. It helps improve your store's visibility in image search results.

4. JSON-LD for SEO: This app adds structured data to your store, helping search engines better understand your content and display rich snippets in search results. It improves visibility and click-through rates.

5. Smart SEO: Smart SEO automatically generates meta tags, titles, and descriptions for your store's products, collections, and pages based on predefined templates. It saves time and ensures consistent SEO optimization.

6. SEO Booster: SEO Booster analyzes your store's SEO performance and provides actionable insights to improve rankings. It offers keyword suggestions, backlink tracking, and competitor analysis features.

These apps can complement your SEO efforts and help optimize your Shopify store for better search engine visibility and rankings.