There are many places where you can solve this issue. You can skip down to find out the answer to this question right away, but I want to give the basic advice when choosing a theme:
- Check the speed of the demo site. Visitors do not like to wait.
- Make sure that the code structure is SEO friendly.
- Look at the feedback from other buyers.
If you want to get a theme for creating your site, then you can see them on this site by clicking on this link – Themes.