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Is it 'OK' to have multiple domains in the following instance? Does Google actively discourage multiple (but completely different sites) domains from the same company appearing in the search results for the same and or similar keywords if the content is slightly different? This is where the 'main site' has the details, and you can purchase product, and the second site is a blog site only. We are creating a separate content blogsite; which would be on a second domain that will be related to one portion of content on main site. They would be linking back and forth, or maybe the blog site would just link over to the main site so they can purchase said product. This would be a similar scenario to give you an idea of how it would be structured: MAIN SITE: describes a few products, and you can purchase from this site SECOND SITE, different domain: a blog site that contains personal experiences with one of the products. BOTH sites will be linked back and forth....or as mentioned maybe the blog site could just link over to the 'main site' Logo would be a modified version of the main logo and look and feel of the sight would be similar but not exactly the same. MORE INFO: the main site has existed for way over 10 years, starting to gain some traction in an extremely competitive market, but does not rank super high, is gaining traction due to improvements in speed, content, onpage SEO, etc... So in addition to my main question of is this 'ok' to have this second domain, also will it hurt the rankings or negatively affect the 'main' site? Wondering about duplicate content issues, except it will be slightly different...

Is it Ok to have multiple domains (separate website different content) rank for similar keywords? Is it 'OK' to have multiple domains in the following instance? Does Google actively discourage multiple (but completely different sites) domains from the same company appearing in the search results for the same and or similar keywords if the content is slightly different? This is where the 'main site' has the details, and you can purchase product, and the second site is a blog site only. We are creating a separate content blogsite; which would be on a second domain that will be related to one portion of content on main site. They would be linking back and forth, or maybe the blog site would just link over to the main site so they can purchase said product. This would be a similar scenario to give you an idea of how it would be structured: MAIN SITE: describes a few products, and you can purchase from this site SECOND SITE, different domain: a blog site that contains personal experiences
with one of the products. BOTH sites will be linked back and forth....or as mentioned maybe the blog site could just link over to the 'main site' Logo would be a modified version of the main logo and look and feel of the sight would be similar but not exactly the same. MORE INFO: the main site has existed for way over 10 years, starting to gain some traction in an extremely competitive market, but does not rank super high, is gaining traction due to improvements in speed, content, onpage SEO, etc... So in addition to my main question of is this 'ok' to have this second domain, also will it hurt the rankings or negatively affect the 'main' site, will we have duplicate content issues? ** If this is not the right place to ask this then where should I be asking?
Thank you!