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Please correct me where I wrong in the following passage. Thank you in advance!

Word-of-a-mouth advertising

Property owners who market their property via your web site and see good results are likely to recommend you to their colleagues. Thus, more and more owners will want to be listed on your web site. The more owners you have the more money you earn.

Likewise, those who reserved a property via your web site and liked the ease and availability of online service are likely to recommend you to their relatives or friends. This is a good alternative to just giving your phone number. Via phone, you can not show property photos and very often can not check immediately the availability of the property on the certain period of time.
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Word-of-mouth advertising

Property owners who market their property via your web site and see good results are likely to recommend you to their colleagues. Thus, more and more owners will want to be listed on your web site. The more owners you have, the more money you earn.

Likewise, those who reserved a property via your web site and liked the ease and availability of online service are likely to recommend you to their relatives or friends. This is a good alternative to just giving your phone number. Via phone, you cannot show property photos and very often cannot check immediately the availability of the property within the specified period of time.

The word reserved seems odd to me here. What's wrong with bought?
Word of mouth, not word of a mouth.

ease of the online service

I don't like the 'alternative to giving your phone number' sentence, try and re-phrase that one and the following sentence.
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Mister Micawber, I do not think the bought word can be used here. The web site is meant for property rentals, not for property sale. Is reserved wrong word here? Thanks.
2nona the brit:

Thanks! What do you think about such variant instead of alternative?:

"Bringing them to your web site is better than to just giving your phone number".

Thanks!
You wrote 'Property owners who market their property', so I naturally assumed website visitors were buying and selling. I would change this to something like 'who offer rental property', and use rent or lease instead of reserve.
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Many thanks for bringing this to my attention. [Y]